Tulane U.

Rankings
Data year | Earned doctorates | Full-time graduate students | Total R&D expenditures | |||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Rank | Percentile | Institutions ranked | Rank | Percentile | Institutions ranked | Rank | Percentile | Institutions ranked | Rank | Percentile | Institutions ranked | |
2021 | 128 | 29.1 | 448 | 100 | 15.2 | 691 | 57 | 10.5 | 583 | 119 | 13.9 | 909 |
2020 | 146 | 33 | 450 | 92 | 13.9 | 697 | 116 | 13.5 | 915 | |||
2019 | 149 | 33.8 | 447 | 110 | 16.5 | 696 | 52 | 9.6 | 589 | 115 | 13.4 | 913 |
2018 | 158 | 37.4 | 428 | 106 | 15.9 | 698 | 115 | 13.4 | 910 | |||
2017 | 139 | 33.2 | 425 | 104 | 15.9 | 684 | 57 | 10.7 | 575 | 120 | 14.2 | 897 |
2016 | 135 | 31.9 | 430 | 117 | 17.5 | 697 | 121 | 14.3 | 895 | |||
2015 | 139 | 33.2 | 426 | 115 | 17.3 | 693 | 105 | 19.1 | 570 | 121 | 14.3 | 897 |
2014 | 135 | 32.5 | 422 | 103 | 15.7 | 688 | 120 | 14.3 | 887 | |||
2013 | 124 | 30.3 | 417 | 108 | 20.1 | 555 | 115 | 20.2 | 588 | 117 | 14 | 884 |
2012 | 131 | 32.3 | 412 | 112 | 20.8 | 555 | 115 | 13.7 | 892 |
NOTES:
- 1. See TableBuilder for the prior year data.
- 2. Blank white cells indicate data not available, not applicable, or institution not eligible for survey.
- 3. Data from the Survey of Science and Engineering Research Facilities is collected every two years.
Data

Fields | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 | 2014 | 2013 | 2012 |
---|---|---|---|---|---|---|---|---|---|---|
All fields | 119 | 109 | 102 | 91 | 107 | 116 | 111 | 111 | 127 | 114 |
Science and engineering | 91 | 92 | 84 | 72 | 84 | 79 | 92 | 86 | 107 | 84 |
Science | 76 | 75 | 71 | 61 | 81 | 71 | 82 | 73 | 91 | 83 |
Life science | 31 | 25 | 26 | 24 | 41 | 29 | 51 | 50 | 50 | 42 |
Agricultural sciences | . | . | . | . | 2 | 1 | . | 1 | . | . |
Biological sciences | 26 | 19 | 23 | 23 | 31 | 28 | 43 | 32 | 30 | 27 |
Health sciences | 5 | 6 | 3 | 1 | 8 | . | 8 | 17 | 20 | 15 |
Physical sciences and earth sciences | 17 | 18 | 20 | 12 | 9 | 12 | 11 | 11 | 15 | 12 |
Chemistry | 9 | 13 | 8 | 3 | 6 | 8 | 7 | 5 | 9 | 8 |
Earth, atmospheric, and ocean sciences | 3 | 1 | 3 | 4 | 1 | 1 | 3 | 2 | 1 | 1 |
Physics and astronomy | 5 | 4 | 9 | 5 | 2 | 3 | 1 | 4 | 5 | 3 |
Mathematics and computer sciences | 7 | 8 | 7 | 7 | 8 | 8 | 6 | 3 | 7 | 13 |
Computer sciences | . | 1 | . | . | . | . | . | . | . | . |
Mathematics | 7 | 7 | 7 | 7 | 8 | 8 | 6 | 3 | 7 | 13 |
Psychology and social sciences | 21 | 24 | 18 | 18 | 23 | 22 | 14 | 9 | 19 | 16 |
Psychology | 6 | 2 | 6 | 9 | 4 | 10 | 7 | 1 | 8 | 5 |
Anthropology | 3 | 3 | 4 | 1 | 5 | 1 | 1 | 6 | 6 | 7 |
Economics | 5 | 8 | 2 | 2 | 2 | 5 | 1 | 1 | . | . |
Political science and government | . | . | . | . | . | . | 1 | . | . | . |
Sociology | 3 | 1 | 2 | . | 2 | . | 1 | . | . | 1 |
Other social sciences | 4 | 10 | 4 | 6 | 10 | 6 | 3 | 1 | 5 | 3 |
Engineering | 15 | 17 | 13 | 11 | 3 | 8 | 10 | 13 | 16 | 1 |
Biological/biomedical sciences | 8 | 7 | 5 | 8 | 1 | 4 | 3 | 7 | 7 | . |
Chemical engineering | 7 | 9 | 7 | 3 | 2 | 4 | 6 | 5 | 8 | 1 |
Materials/metallurgical engineering | . | . | 1 | . | . | . | 1 | 1 | . | . |
Other engineering | . | 1 | . | . | . | . | . | . | 1 | . |
Non-science and engineering | 28 | 17 | 18 | 19 | 23 | 37 | 19 | 25 | 20 | 30 |
Education | 1 | . | 1 | . | . | . | . | . | . | . |
Education administration | 1 | . | 1 | . | . | . | . | . | . | . |
Humanities | 16 | 11 | 13 | 14 | 12 | 24 | 12 | 17 | 12 | 18 |
Foreign languages & literature | 6 | 3 | 6 | 7 | 3 | 7 | 6 | 3 | 2 | 6 |
History | 2 | 3 | 1 | 4 | 5 | 2 | 1 | 6 | 3 | 3 |
Letters | 1 | . | . | . | 1 | 4 | 2 | 3 | 2 | 4 |
Other humanities and arts | 7 | 5 | 6 | 3 | 3 | 11 | 3 | 5 | 5 | 5 |
Other | 11 | 6 | 4 | 5 | 11 | 13 | 7 | 8 | 8 | 12 |
Business management/administration | 5 | 3 | . | 4 | 9 | 11 | 5 | 2 | 4 | 9 |
Communication | . | . | . | . | . | . | 1 | 1 | . | . |
Fields not elsewhere classified (nec) | 6 | 3 | 4 | 1 | 2 | 2 | 1 | 5 | 4 | 3 |
NOTE:
- . = data were not collected at this level or institution was not eligible to participate for this survey year.
SOURCE: National Center for Science and Engineering Statistics, Survey of Earned Doctorates
All races | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 | 2014 | 2013 | 2012 |
---|---|---|---|---|---|---|---|---|---|---|
All full-time students | 1,519 | 1,453 | 1,345 | 1,376 | 1,418 | 1,344 | 1,376 | 1,477 | 1,407 | 1,248 |
Male | 561 | 539 | 542 | 559 | 584 | 540 | 549 | 609 | 556 | 495 |
Female | 958 | 914 | 803 | 817 | 834 | 804 | 827 | 868 | 851 | 753 |
U.S. citizens and permanent residents | 1,157 | 1,108 | 981 | 1,017 | 1,075 | 992 | 1,037 | 1,098 | 1,028 | 933 |
Hispanic or Latino | 126 | 105 | 83 | 95 | 94 | 76 | 63 | 50 | 42 | 34 |
Not Hispanic or Latino | 971 | 923 | 835 | 871 | 934 | 895 | 911 | 1,002 | 932 | 824 |
American Indian or Alaska Native | 2 | 3 | 4 | 4 | 4 | 6 | 5 | 6 | 6 | 7 |
Asian | 116 | 108 | 87 | 90 | 102 | 89 | 67 | 86 | 79 | 65 |
Black or African American | 155 | 146 | 108 | 110 | 116 | 85 | 85 | 94 | 87 | 108 |
Native Hawaiian or Other Pacific Islander | 0 | 1 | 2 | 2 | 2 | 3 | 1 | 5 | 5 | 2 |
White | 672 | 634 | 595 | 608 | 656 | 676 | 736 | 804 | 751 | 632 |
More than one race | 26 | 31 | 39 | 57 | 54 | 36 | 17 | 7 | 4 | 10 |
Unknown ethnicity and race | 60 | 80 | 63 | 51 | 47 | 21 | 63 | 46 | 54 | 75 |
Temporary visa holders | 362 | 345 | 364 | 359 | 343 | 352 | 339 | 379 | 379 | 315 |
Science and engineering | 1,118 | 1,112 | 1,049 | 1,055 | 1,062 | 952 | 941 | 947 | 907 | 831 |
Science | 1,022 | 1,008 | 953 | 964 | 976 | 871 | 853 | 854 | 832 | 748 |
Agricultural and veterinary sciences | 0 | 0 | . | . | . | . | . | . | . | . |
Biological and biomedical sciences | 585 | 545 | 499 | 517 | 542 | 420 | 427 | 470 | 441 | 407 |
Communication | . | . | . | . | . | . | 0 | 0 | 0 | . |
Computer and information sciences | 17 | 17 | 13 | 13 | 8 | 4 | 0 | 0 | 0 | . |
Family and consumer sciences and human sciences | . | . | . | . | . | . | . | . | . | . |
Geosciences, atmospheric sciences, and ocean sciences | 30 | 31 | 25 | 20 | 30 | 27 | 24 | 25 | 29 | 25 |
Mathematics and statistics | 44 | 43 | 42 | 45 | 51 | 56 | 61 | 53 | 52 | 48 |
Multidisciplinary and interdisciplinary studies | 10 | 14 | 16 | 13 | 12 | 11 | 16 | 12 | 11 | 1 |
Natural resources and conservation | . | . | . | . | . | . | . | . | . | . |
Neurobiology and neuroscience | . | . | . | . | . | 25 | 21 | 25 | 26 | 27 |
Physical sciences | 78 | 80 | 103 | 93 | 95 | 94 | 92 | 95 | 86 | 75 |
Psychology | 39 | 46 | 32 | 45 | 53 | 43 | 53 | 32 | 45 | 42 |
Social sciences | 219 | 232 | 223 | 218 | 185 | 191 | 159 | 142 | 142 | 123 |
Engineering | 96 | 104 | 96 | 91 | 86 | 81 | 88 | 93 | 75 | 83 |
Aerospace, aeronautical, and astronautical engineering | . | . | . | . | . | . | . | . | . | . |
Biological, biomedical, and biosystems engineering | 41 | 53 | 51 | 43 | 41 | 41 | 54 | 54 | 38 | 43 |
Chemical, petroleum, and chemical-related engineering | 38 | 36 | 41 | 46 | 42 | 40 | 34 | 39 | 37 | 40 |
Civil, environmental, transportation and related engineering fields | . | . | . | . | . | . | . | . | . | . |
Electrical, electronics, communications and computer engineering | . | . | . | . | . | . | . | . | . | . |
Industrial, manufacturing, systems engineering and operations research | . | . | . | . | . | . | . | . | . | . |
Mechanical engineering | . | . | . | . | . | . | . | . | . | . |
Metallurgical, mining, materials and related engineering fields | 17 | 15 | 4 | 2 | 3 | . | . | . | . | . |
Other engineering | . | . | . | . | . | . | . | . | . | . |
Health | 401 | 341 | 296 | 321 | 356 | 392 | 435 | 530 | 500 | 417 |
Clinical medicine | 399 | 341 | 296 | 321 | 356 | 392 | 435 | 530 | 500 | 417 |
Other health | 2 | . | 0 | 0 | 0 | . | . | . | . | . |
NOTE:
- . = data were not collected at this level or institution was not eligible to participate for this survey year.
- Fields of study are grouped as they appear in survey data table (https://www.nsf.gov/statistics/srvygradpostdoc/#tabs-2).
All races | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 | 2014 | 2013 | 2012 |
---|---|---|---|---|---|---|---|---|---|---|
All part-time students | 249 | 236 | 105 | 78 | 93 | 82 | 96 | 108 | 92 | 126 |
Male | 49 | 56 | 36 | 31 | 33 | 39 | 47 | 45 | 38 | 53 |
Female | 200 | 180 | 69 | 47 | 60 | 43 | 49 | 63 | 54 | 73 |
U.S. citizens and permanent residents | 238 | 220 | 97 | 72 | 83 | 78 | 84 | 99 | 81 | 111 |
Hispanic or Latino | 23 | 24 | 11 | 6 | 9 | 4 | 2 | 5 | 4 | 0 |
Not Hispanic or Latino | 207 | 191 | 79 | 64 | 72 | 71 | 81 | 90 | 76 | 103 |
American Indian or Alaska Native | 1 | 0 | 0 | 0 | 0 | 0 | 2 | 1 | 2 | 8 |
Asian | 18 | 11 | 6 | 7 | 9 | 8 | 4 | 6 | 5 | 5 |
Black or African American | 74 | 53 | 19 | 7 | 12 | 12 | 13 | 17 | 10 | 12 |
Native Hawaiian or Other Pacific Islander | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
White | 111 | 124 | 50 | 47 | 48 | 47 | 60 | 66 | 59 | 78 |
More than one race | 2 | 3 | 4 | 3 | 3 | 4 | 2 | 0 | 0 | 0 |
Unknown ethnicity and race | 8 | 5 | 7 | 2 | 2 | 3 | 1 | 4 | 1 | 8 |
Temporary visa holders | 11 | 16 | 8 | 6 | 10 | 4 | 12 | 9 | 11 | 15 |
Science and engineering | 37 | 37 | 34 | 31 | 26 | 12 | 14 | 16 | 16 | 51 |
Science | 37 | 37 | 34 | 29 | 24 | 11 | 14 | 16 | 16 | 51 |
Agricultural and veterinary sciences | 0 | 0 | . | . | . | . | . | . | . | . |
Biological and biomedical sciences | 21 | 22 | 14 | 18 | 11 | 10 | 14 | 4 | 12 | 49 |
Communication | . | . | . | . | . | . | 0 | 0 | 0 | . |
Computer and information sciences | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | . |
Family and consumer sciences and human sciences | . | . | . | . | . | . | . | . | . | . |
Geosciences, atmospheric sciences, and ocean sciences | 2 | 0 | 1 | 2 | 0 | 0 | 0 | 0 | 0 | 0 |
Mathematics and statistics | 2 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Multidisciplinary and interdisciplinary studies | 0 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Natural resources and conservation | . | . | . | . | . | . | . | . | . | . |
Neurobiology and neuroscience | . | . | . | . | . | 0 | 0 | 0 | 0 | 0 |
Physical sciences | 1 | 2 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Psychology | 0 | 0 | 7 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Social sciences | 11 | 10 | 8 | 9 | 13 | 1 | 0 | 12 | 4 | 2 |
Engineering | 0 | 0 | 0 | 2 | 2 | 1 | 0 | 0 | 0 | 0 |
Aerospace, aeronautical, and astronautical engineering | . | . | . | . | . | . | . | . | . | . |
Biological, biomedical, and biosystems engineering | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
Chemical, petroleum, and chemical-related engineering | 0 | 0 | 0 | 1 | 2 | 1 | 0 | 0 | 0 | 0 |
Civil, environmental, transportation and related engineering fields | . | . | . | . | . | . | . | . | . | . |
Electrical, electronics, communications and computer engineering | . | . | . | . | . | . | . | . | . | . |
Industrial, manufacturing, systems engineering and operations research | . | . | . | . | . | . | . | . | . | . |
Mechanical engineering | . | . | . | . | . | . | . | . | . | . |
Metallurgical, mining, materials and related engineering fields | 0 | 0 | 0 | 0 | 0 | . | . | . | . | . |
Other engineering | . | . | . | . | . | . | . | . | . | . |
Health | 212 | 199 | 71 | 47 | 67 | 70 | 82 | 92 | 76 | 75 |
Clinical medicine | 212 | 199 | 71 | 47 | 67 | 70 | 82 | 92 | 76 | 75 |
Other health | 0 | . | 0 | 0 | 0 | . | . | . | . | . |
NOTE:
- . = data were not collected at this level or institution was not eligible to participate for this survey year.
- Fields of study are grouped as they appear in survey data table (https://www.nsf.gov/statistics/srvygradpostdoc/#tabs-2).
Field | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 | 2014 | 2013 | 2012 |
---|---|---|---|---|---|---|---|---|---|---|
All surveyed fields | 119 | 103 | 98 | 103 | 41 | 90 | 102 | 126 | 189 | 197 |
Science and engineering | 99 | 89 | 92 | 97 | 34 | 72 | 98 | 113 | 167 | 146 |
Science | 81 | 70 | 83 | 86 | 24 | 47 | 63 | 82 | 136 | 118 |
Agricultural and veterinary sciences | 0 | 0 | . | . | . | . | . | . | . | . |
Biological and biomedical sciences | 70 | 57 | 58 | 74 | 15 | 21 | 21 | 42 | 84 | 69 |
Communication | . | . | . | . | . | . | 0 | 0 | 0 | . |
Computer and information sciences | 3 | 1 | 3 | 1 | 0 | 0 | 0 | 0 | 0 | . |
Family and consumer sciences and human sciences | . | . | . | . | . | . | . | . | . | . |
Geosciences, atmospheric sciences, and ocean sciences | 2 | 1 | 3 | 2 | 0 | 0 | 10 | 0 | 13 | 8 |
Mathematics and statistics | 0 | 0 | 0 | 2 | 1 | 3 | 5 | 2 | 2 | 3 |
Multidisciplinary and interdisciplinary studies | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Natural resources and conservation | . | . | . | . | . | . | . | . | . | . |
Neurobiology and neuroscience | . | . | . | . | . | 0 | 3 | 7 | 11 | 5 |
Psychology | 0 | 1 | 0 | 0 | 0 | 2 | 4 | 4 | 4 | 9 |
Physical sciences | 6 | 9 | 15 | 7 | 5 | 20 | 19 | 27 | 22 | 24 |
Social sciences | 0 | 1 | 4 | 0 | 3 | 1 | 1 | 0 | 0 | 0 |
Engineering | 18 | 19 | 9 | 11 | 10 | 25 | 35 | 31 | 31 | 28 |
Aerospace, aeronautical, and astronautical engineering | . | . | . | . | . | . | . | . | . | . |
Biological, biomedical, and biosystems engineering | 10 | 10 | 8 | 4 | 0 | 22 | 27 | 23 | 15 | 12 |
Chemical, petroleum, and chemical-related engineering | 6 | 7 | 1 | 7 | 10 | 3 | 8 | 8 | 16 | 16 |
Civil, environmental, transportation and related engineering fields | . | . | . | . | . | . | . | . | . | . |
Electrical, electronics, communications and computer engineering | . | . | . | . | . | . | . | . | . | . |
Industrial, manufacturing, systems engineering and operations research | . | . | . | . | . | . | . | . | . | . |
Mechanical engineering | . | . | . | . | . | . | . | . | . | . |
Metallurgical, mining, materials and related engineering fields | 2 | 2 | 0 | 0 | 0 | . | . | . | . | . |
Other engineering | . | . | . | . | . | . | . | . | . | . |
Health | 20 | 14 | 6 | 6 | 7 | 18 | 4 | 13 | 22 | 51 |
Clinical medicine | 20 | 14 | 6 | 6 | 7 | 18 | 4 | 13 | 22 | 51 |
Other health | 0 | . | 0 | 0 | 0 | . | . | . | . | . |
NOTE:
- . = data were not collected at this level or institution was not eligible to participate for this survey year.
- Fields of study are grouped as they appear in survey data table (https://www.nsf.gov/statistics/srvygradpostdoc/#tabs-2).
Type and primary source of support | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 | 2014 | 2013 | 2012 |
---|---|---|---|---|---|---|---|---|---|---|
All types and sources of support | 1,519 | 1,453 | 1,345 | 1,376 | 1,418 | 1,344 | 1,376 | 1,477 | 1,407 | 1,248 |
Fellowships | 96 | 119 | 146 | 149 | 114 | 124 | 167 | 168 | 143 | 158 |
Federal | 12 | 15 | 8 | 12 | 4 | 28 | 26 | 39 | 35 | 72 |
Institutional | 81 | 99 | 133 | 127 | 110 | 92 | 125 | 121 | 106 | 33 |
Nonfederal | 3 | 5 | 5 | 10 | 0 | 4 | 16 | 8 | 2 | 53 |
Research assistantships | 300 | 282 | 229 | 276 | 275 | 169 | 169 | 172 | 280 | 157 |
Federal | 105 | 88 | 89 | 88 | 35 | 59 | 66 | 75 | 152 | 115 |
Institutional | 170 | 181 | 121 | 169 | 217 | 89 | 85 | 87 | 85 | 29 |
Nonfederal | 25 | 13 | 19 | 19 | 23 | 21 | 18 | 10 | 43 | 13 |
Teaching assistantships | 304 | 279 | 273 | 239 | 245 | 239 | 260 | 223 | 236 | 234 |
Federal | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
Institutional | 303 | 279 | 271 | 238 | 245 | 239 | 260 | 223 | 236 | 233 |
Nonfederal | 0 | 0 | 2 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
Other types of support | 819 | 773 | 697 | 712 | 784 | 812 | 780 | 914 | 748 | 699 |
Federal | 1 | 0 | 1 | 3 | 2 | 3 | 10 | 12 | 2 | 9 |
Institutional | 113 | 76 | 11 | 39 | 32 | 100 | 71 | 60 | 53 | 159 |
Nonfederal | 0 | 0 | 0 | 2 | 2 | 4 | 3 | 3 | 13 | 12 |
Personal resources | 705 | 697 | 685 | 668 | 748 | 705 | 696 | 839 | 680 | 519 |
NOTE:
- . = data were not collected at this level or institution was not eligible to participate for this survey year.
All races | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 | 2014 | 2013 | 2012 |
---|---|---|---|---|---|---|---|---|---|---|
Science and engineering | 123 | 100 | 99 | 71 | 72 | 99 | 103 | 101 | 96 | 87 |
Science | 117 | 95 | 92 | 62 | 66 | 91 | 97 | 97 | 92 | 84 |
Agricultural and veterinary sciences | 2 | 7 | . | . | . | . | . | . | . | . |
Biological and biomedical sciences | 82 | 54 | 50 | 40 | 37 | 63 | 69 | 63 | 63 | 68 |
Communication | . | . | . | . | . | . | 0 | 1 | 2 | . |
Computer and information sciences | 2 | 5 | 6 | 2 | 4 | 2 | 0 | 2 | 2 | . |
Family and consumer sciences and human sciences | . | . | . | . | . | . | . | . | . | . |
Geosciences, atmospheric sciences, and ocean sciences | 2 | 2 | 6 | 1 | 3 | 3 | 0 | 2 | 2 | 1 |
Mathematics and statistics | 2 | 3 | 7 | 5 | 7 | 6 | 7 | 9 | 8 | 5 |
Multidisciplinary and interdisciplinary studies | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
Natural resources and conservation | . | . | . | . | . | . | . | . | . | . |
Neurobiology and neuroscience | . | . | . | . | . | 0 | 0 | 0 | 0 | 0 |
Physical sciences | 7 | 9 | 11 | 5 | 7 | 7 | 8 | 9 | 9 | 6 |
Psychology | 7 | 4 | 2 | 0 | 0 | 0 | 1 | 1 | 0 | 0 |
Social sciences | 13 | 11 | 10 | 9 | 8 | 10 | 12 | 10 | 6 | 3 |
Engineering | 6 | 5 | 7 | 9 | 6 | 8 | 6 | 4 | 4 | 3 |
Aerospace, aeronautical, and astronautical engineering | . | . | . | . | . | . | . | . | . | . |
Biological, biomedical, and biosystems engineering | 3 | 3 | 5 | 7 | 5 | 6 | 3 | 2 | 0 | 2 |
Chemical, petroleum, and chemical-related engineering | 3 | 2 | 2 | 2 | 1 | 2 | 3 | 2 | 4 | 1 |
Civil, environmental, transportation and related engineering fields | . | . | . | . | . | . | . | . | . | . |
Electrical, electronics, communications and computer engineering | . | . | . | . | . | . | . | . | . | . |
Industrial, manufacturing, systems engineering and operations research | . | . | . | . | . | . | . | . | . | . |
Mechanical engineering | . | . | . | . | . | . | . | . | . | . |
Metallurgical, mining, materials and related engineering fields | 0 | 0 | 0 | 0 | 0 | . | . | . | . | . |
Other engineering | . | . | . | . | . | . | . | . | . | . |
Health | 4 | 41 | 48 | 44 | 46 | 29 | 30 | 23 | 66 | 56 |
Clinical medicine | 4 | 41 | 41 | 38 | 37 | 29 | 30 | 23 | 66 | 56 |
Other health | 0 | . | 7 | 6 | 9 | . | . | . | . | . |
NOTE:
- . = data were not collected at this level or institution was not eligible to participate for this survey year.
- Fields of study are grouped as they appear in survey data table (https://www.nsf.gov/statistics/srvygradpostdoc/#tabs-2).
Field | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 | 2014 | 2013 | 2012 |
---|---|---|---|---|---|---|---|---|---|---|
All surveyed fields | 72 | 90 | 92 | 74 | 73 | 74 | 74 | 67 | 97 | 77 |
Science and engineering | 72 | 72 | 64 | 52 | 47 | 63 | 68 | 59 | 65 | 49 |
Science | 68 | 69 | 60 | 44 | 42 | 58 | 64 | 58 | 64 | 47 |
Agricultural and veterinary sciences | 1 | 5 | . | . | . | . | . | . | . | . |
Biological and biomedical sciences | 58 | 46 | 41 | 35 | 30 | 44 | 53 | 41 | 47 | 40 |
Communication | . | . | . | . | . | . | 0 | 0 | 0 | . |
Computer and information sciences | 1 | 4 | 4 | 2 | 3 | 2 | 0 | 0 | 1 | . |
Family and consumer sciences and human sciences | . | . | . | . | . | . | . | . | . | . |
Geosciences, atmospheric sciences, and ocean sciences | 2 | 2 | 4 | 1 | 0 | 2 | 0 | 1 | 2 | 0 |
Mathematics and statistics | 1 | 3 | 4 | 2 | 5 | 5 | 6 | 9 | 8 | 3 |
Multidisciplinary and interdisciplinary studies | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Natural resources and conservation | . | . | . | . | . | . | . | . | . | . |
Neurobiology and neuroscience | . | . | . | . | . | 0 | 0 | 0 | 0 | 0 |
Psychology | 3 | 3 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 0 |
Physical sciences | 2 | 6 | 7 | 4 | 4 | 5 | 3 | 4 | 5 | 4 |
Social sciences | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 2 | 1 | 0 |
Engineering | 4 | 3 | 4 | 8 | 5 | 5 | 4 | 1 | 1 | 2 |
Aerospace, aeronautical, and astronautical engineering | . | . | . | . | . | . | . | . | . | . |
Biological, biomedical, and biosystems engineering | 1 | 2 | 4 | 6 | 5 | 5 | 3 | 1 | 0 | 2 |
Chemical, petroleum, and chemical-related engineering | 3 | 1 | 0 | 2 | 0 | 0 | 1 | 0 | 1 | 0 |
Civil, environmental, transportation and related engineering fields | . | . | . | . | . | . | . | . | . | . |
Electrical, electronics, communications and computer engineering | . | . | . | . | . | . | . | . | . | . |
Industrial, manufacturing, systems engineering and operations research | . | . | . | . | . | . | . | . | . | . |
Mechanical engineering | . | . | . | . | . | . | . | . | . | . |
Metallurgical, mining, materials and related engineering fields | 0 | 0 | 0 | 0 | 0 | . | . | . | . | . |
Other engineering | . | . | . | . | . | . | . | . | . | . |
Health | 0 | 18 | 28 | 22 | 26 | 11 | 6 | 8 | 32 | 28 |
Clinical medicine | 0 | 18 | 22 | 17 | 17 | 11 | 6 | 8 | 32 | 28 |
Other health | 0 | . | 6 | 5 | 9 | . | . | . | . | . |
NOTE:
- . = data were not collected at this level or institution was not eligible to participate for this survey year.
- Fields of study are grouped as they appear in survey data table (https://www.nsf.gov/statistics/srvygradpostdoc/#tabs-2).
Field | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 | 2014 | 2013 | 2012 | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
All R&D fields | 205,206 | 204,430 | 196,933 | 193,294 | 180,993 | 165,438 | 152,658 | 157,825 | 160,414 | 164,373 | ||||||||||
Science | 185,206 | 183,843 | 174,028 | 172,378 | 160,537 | 146,640 | 133,096 | 142,046 | 144,248 | 148,703 | ||||||||||
Computer and information sciences | 1,873 | 2,257 | 2,312 | 2,511 | 1,933 | 365 | 0 | 0 | 0 | 0 | ||||||||||
Geosciences, atmospheric sciences, and ocean sciences | 4,217 | 4,825 | 4,317 | 3,753 | 3,409 | 2,781 | 591 | 1,278 | 1,700 | 1,929 | ||||||||||
Atmospheric science and meteorology | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||||||||||
Geological and earth sciences | 4,217 | 4,825 | 4,317 | 3,753 | 3,409 | 2,781 | 591 | 1,278 | 1,700 | 1,929 | ||||||||||
Ocean sciences and marine sciences | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||||||||||
Geosciences, atmospheric sciences, and ocean sciences, not elsewhere classified | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||||||||||
Life sciences | 164,874 | 161,642 | 152,554 | 151,823 | 137,828 | 126,733 | 117,783 | 129,828 | 130,354 | 136,024 | ||||||||||
Agricultural sciences | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||||||||||
Biological and biomedical sciences | 36,099 | 39,053 | 30,686 | 33,655 | 29,322 | 27,277 | 26,213 | 28,066 | 28,373 | 34,446 | ||||||||||
Health sciences | 46,935 | 41,445 | 36,399 | 37,352 | 33,940 | 32,737 | 31,567 | 35,586 | 31,735 | 24,535 | ||||||||||
Natural resources and conservation | 159 | 133 | 384 | 431 | 388 | 552 | 0 | 0 | 0 | 0 | ||||||||||
Life sciences, not elsewhere classified | 81,681 | 81,011 | 85,085 | 80,385 | 74,178 | 66,167 | 60,003 | 66,176 | 70,246 | 77,043 | ||||||||||
Mathematics and statistics | 518 | 581 | 814 | 1,718 | 1,768 | 2,077 | 2,053 | 1,879 | 2,182 | 1,882 | ||||||||||
Physical sciences | 5,018 | 5,720 | 6,448 | 5,732 | 6,900 | 6,205 | 4,946 | 3,575 | 4,555 | 4,722 | ||||||||||
Astronomy and astrophysics | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||||||||||
Chemistry | 2,227 | 2,734 | 3,121 | 1,866 | 2,337 | 2,871 | 2,785 | 2,390 | 2,851 | 2,910 | ||||||||||
Materials science | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||||||||||
Physics | 2,791 | 2,986 | 3,327 | 3,866 | 4,563 | 3,334 | 2,161 | 1,185 | 1,704 | 1,812 | ||||||||||
Physical sciences, not elsewhere classified | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||||||||||
Psychology | 1,771 | 1,942 | 2,342 | 1,915 | 1,464 | 1,278 | 850 | 908 | 1,370 | 862 | ||||||||||
Social sciences | 6,935 | 6,876 | 5,241 | 4,926 | 7,235 | 7,201 | 6,873 | 4,578 | 4,087 | 3,284 | ||||||||||
Anthropology | 660 | 606 | 115 | 368 | 1,587 | 507 | 0 | 0 | 0 | 0 | ||||||||||
Economics | 4,443 | 5,222 | 3,896 | 3,678 | 3,726 | 3,943 | 2,785 | 494 | 850 | 268 | ||||||||||
Political science and government | 344 | 509 | 378 | 108 | 51 | 91 | 0 | 0 | 72 | 7 | ||||||||||
Sociology, demography, and population studies | 1,248 | 338 | 454 | 165 | 1,426 | 1,638 | 2,862 | 2,627 | 2,453 | 1,377 | ||||||||||
Social sciences, not elsewhere classified | 240 | 201 | 398 | 607 | 445 | 1,022 | 1,226 | 1,457 | 712 | 1,632 | ||||||||||
Sciences, not elsewhere classified | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||||||||||
Engineering | 6,662 | 6,881 | 8,416 | 7,435 | 6,801 | 6,658 | 7,022 | 6,738 | 7,066 | 5,493 | ||||||||||
Aerospace, aeronautical, and astronautical engineering | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||||||||||
Bioengineering and biomedical engineering | 3,994 | 3,827 | 4,669 | 4,599 | 3,774 | 3,022 | 1,616 | 1,472 | 1,779 | 1,664 | ||||||||||
Chemical engineering | 2,657 | 3,015 | 3,141 | 2,836 | 2,915 | 3,390 | 5,077 | 4,809 | 5,137 | 3,817 | ||||||||||
Civil engineering | 3 | 0 | 595 | 0 | 97 | 234 | 240 | 99 | 61 | 12 | ||||||||||
Electrical, electronic, and communications engineering | 0 | 0 | 0 | 0 | 0 | 0 | 86 | 358 | 89 | 0 | ||||||||||
Industrial and manufacturing engineering | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||||||||||
Mechanical engineering | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||||||||||
Metallurgical and materials engineering | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||||||||||
Engineering not elsewhere classified | 8 | 39 | 11 | 0 | 15 | 12 | 3 | 0 | 0 | 0 | ||||||||||
Non-S&E | 13,338 | 13,706 | 14,489 | 13,481 | 13,655 | 12,140 | 12,540 | 9,041 | 9,100 | 10,177 | ||||||||||
Business management and business administration | 284 | 0 | 285 | 427 | 26 | 17 | 0 | 162 | 243 | 383 | ||||||||||
Communication and communications technologies | 151 | 68 | 119 | 126 | 247 | 75 | 71 | 14 | 68 | 134 | ||||||||||
Education | 0 | 6 | 6 | 7 | 630 | 538 | 312 | 0 | 0 | 0 | ||||||||||
Humanities | 1,323 | 1,226 | 2,293 | 1,081 | 1,055 | 746 | 1,339 | 54 | 593 | 1,039 | ||||||||||
Law | 4,835 | 5,547 | 4,927 | 4,822 | 5,036 | 5,619 | 5,503 | 2,728 | 2,907 | 2,339 | ||||||||||
Social work | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 46 | 0 | ||||||||||
Visual and performing arts | 227 | 483 | 422 | 309 | 857 | 184 | 74 | 2 | 292 | 425 | ||||||||||
Non-S&E, not elsewhere classified | 6,518 | 6,376 | 6,437 | 6,709 | 5,804 | 4,961 | 5,241 | 6,081 | 4,951 | 5,857 |
NOTE:
- . = data were not collected at this level or institution was not eligible to participate for this survey year.
- Prior to FY 2016, expenditures for natural resources and conservation, materials science, anthropology, and industrial and manufacturing engineering were not collected separately. R&D expenditures in agricultural sciences decreased in FY 2016 because a number of disciplines previously reported in that field are now reported separately under natural resources and conservation.
SOURCE: National Center for Science and Engineering Statistics, Higher Education R&D Survey
Field | All R&D expenditures | Federal government | State and local government | Institution funds | Business | Nonprofit organizations | All other sources | |||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
All R&D fields | 205,206 | 113,819 | 4,442 | 49,660 | 8,279 | 15,569 | 13,437 | |||||||
Science | 185,206 | 109,418 | 4,036 | 34,985 | 8,223 | 15,223 | 13,321 | |||||||
Computer and information sciences | 1,873 | 1,472 | 0 | 401 | 0 | 0 | 0 | |||||||
Geosciences, atmospheric sciences, and ocean sciences | 4,217 | 2,074 | 586 | 1,289 | 48 | 220 | 0 | |||||||
Atmospheric science and meteorology | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |||||||
Geological and earth sciences | 4,217 | 2,074 | 586 | 1,289 | 48 | 220 | 0 | |||||||
Ocean sciences and marine sciences | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |||||||
Geosciences, atmospheric sciences, and ocean sciences, not elsewhere classified | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |||||||
Life sciences | 164,874 | 98,650 | 3,318 | 27,929 | 7,978 | 13,739 | 13,260 | |||||||
Agricultural sciences | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |||||||
Biological and biomedical sciences | 36,099 | 25,730 | 262 | 6,791 | 287 | 3,006 | 23 | |||||||
Health sciences | 46,935 | 21,498 | 2,980 | 14,727 | 4,841 | 997 | 1,892 | |||||||
Natural resources and conservation | 159 | 110 | 0 | 27 | 0 | 22 | 0 | |||||||
Life sciences, not elsewhere classified | 81,681 | 51,312 | 76 | 6,384 | 2,850 | 9,714 | 11,345 | |||||||
Mathematics and statistics | 518 | 381 | 2 | 133 | 0 | 2 | 0 | |||||||
Physical sciences | 5,018 | 3,041 | 50 | 1,667 | 197 | 63 | 0 | |||||||
Astronomy and astrophysics | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |||||||
Chemistry | 2,227 | 1,293 | 50 | 821 | 0 | 63 | 0 | |||||||
Materials science | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |||||||
Physics | 2,791 | 1,748 | 0 | 846 | 197 | 0 | 0 | |||||||
Physical sciences, not elsewhere classified | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |||||||
Psychology | 1,771 | 1,202 | 40 | 457 | 0 | 72 | 0 | |||||||
Social sciences | 6,935 | 2,598 | 40 | 3,109 | 0 | 1,127 | 61 | |||||||
Anthropology | 660 | 10 | 0 | 616 | 0 | 2 | 32 | |||||||
Economics | 4,443 | 2,161 | 0 | 1,211 | 0 | 1,069 | 2 | |||||||
Political science and government | 344 | 0 | 0 | 332 | 0 | 12 | 0 | |||||||
Sociology, demography, and population studies | 1,248 | 402 | 40 | 763 | 0 | 20 | 23 | |||||||
Social sciences, not elsewhere classified | 240 | 25 | 0 | 187 | 0 | 24 | 4 | |||||||
Sciences, not elsewhere classified | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |||||||
Engineering | 6,662 | 4,016 | 316 | 2,014 | 56 | 260 | 0 | |||||||
Aerospace, aeronautical, and astronautical engineering | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |||||||
Bioengineering and biomedical engineering | 3,994 | 3,043 | 2 | 882 | 37 | 30 | 0 | |||||||
Chemical engineering | 2,657 | 973 | 314 | 1,121 | 19 | 230 | 0 | |||||||
Civil engineering | 3 | 0 | 0 | 3 | 0 | 0 | 0 | |||||||
Electrical, electronic, and communications engineering | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |||||||
Industrial and manufacturing engineering | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |||||||
Mechanical engineering | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |||||||
Metallurgical and materials engineering | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |||||||
Engineering not elsewhere classified | 8 | 0 | 0 | 8 | 0 | 0 | 0 | |||||||
Non-S&E | 13,338 | 385 | 90 | 12,661 | 0 | 86 | 116 | |||||||
Business management and business administration | 284 | 188 | 0 | 96 | 0 | 0 | 0 | |||||||
Communication and communications technologies | 151 | 0 | 0 | 145 | 0 | 0 | 6 | |||||||
Education | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |||||||
Humanities | 1,323 | 0 | 90 | 1,201 | 0 | 0 | 32 | |||||||
Law | 4,835 | 0 | 0 | 4,835 | 0 | 0 | 0 | |||||||
Social work | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |||||||
Visual and performing arts | 227 | 0 | 0 | 192 | 0 | 0 | 35 | |||||||
Non-S&E, not elsewhere classified | 6,518 | 197 | 0 | 6,192 | 0 | 86 | 43 |
NOTE:
- . = data were not collected at this level or institution was not eligible to participate for this survey year.
- Prior to FY 2016, expenditures for natural resources and conservation, materials science, anthropology, and industrial and manufacturing engineering were not collected separately. R&D expenditures in agricultural sciences decreased in FY 2016 because a number of disciplines previously reported in that field are now reported separately under natural resources and conservation.
SOURCE: National Center for Science and Engineering Statistics, Higher Education R&D Survey
Source of funds | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 | 2014 | 2013 | 2012 | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Federal Agencies | 113,819 | 107,290 | 104,219 | 102,201 | 93,970 | 89,087 | 84,166 | 94,486 | 97,994 | 101,360 | ||||||||||
DOD | 5,196 | 4,274 | 3,849 | 4,702 | 4,924 | 2,506 | 2,879 | 3,679 | 4,589 | 5,685 | ||||||||||
DOE | 509 | 774 | 908 | 1,043 | 2,425 | 1,616 | 767 | 587 | 951 | 1,716 | ||||||||||
HHS | 95,521 | 88,504 | 87,609 | 85,256 | 75,512 | 74,098 | 70,644 | 77,879 | 80,188 | 79,884 | ||||||||||
NASA | 170 | 84 | 2,093 | 0 | 318 | 63 | 112 | 58 | 175 | 201 | ||||||||||
NSF | 5,047 | 5,614 | 3,396 | 6,676 | 5,638 | 6,359 | 6,145 | 7,094 | 6,814 | 6,200 | ||||||||||
USDA | 63 | 47 | 6 | 0 | 1 | 21 | 49 | 15 | 194 | 462 | ||||||||||
Other | 7,313 | 7,993 | 6,358 | 4,524 | 5,152 | 4,424 | 3,570 | 5,174 | 5,083 | 7,212 |
NOTE:
- . = data were not collected at this level or institution was not eligible to participate for this survey year.
SOURCE: National Center for Science and Engineering Statistics, Higher Education R&D Survey
Year | All personnel | Principal investigators | Other personnel | Postdocs | |||
---|---|---|---|---|---|---|---|
2021 | . | . | . | . | |||
2020 | . | . | . | . | |||
2019 | 1,523 | 269 | 1,254 | . | |||
2018 | 1,328 | 265 | 1,063 | . | |||
2017 | 1,530 | 294 | 1,236 | . | |||
2016 | 1,402 | 222 | 1,180 | . | |||
2015 | 1,328 | 189 | 1,139 | 121 |
NOTE:
- . = data were not collected at this level or institution was not eligible to participate for this survey year.
SOURCE: National Center for Science and Engineering Statistics, Higher Education R&D Survey
Field | 2021 | 2019 | 2017 | 2015 | 2013 |
---|---|---|---|---|---|
All research space | 1,140 | 1,181 | 1,103 | 628 | 546 |
Agricultural sciences | 0 | 0 | 0 | 0 | 0 |
Biological and biomedical sciences | 140 | 143 | 146 | 268 | 226 |
Computer and information sciences | 4 | 4 | 3 | 6 | 1 |
Engineering | 40 | 45 | 35 | 17 | 24 |
Geosciences, atmospheric sciences, and ocean sciences | 42 | 38 | 42 | 17 | 7 |
Health sciences | 288 | 319 | 258 | 205 | 186 |
Mathematics and statistics | 16 | 16 | 15 | 11 | 2 |
Natural resources and conservation | 8 | 6 | 7 | 6 | . |
Physical sciences | 65 | 65 | 66 | 46 | 27 |
Psychology | 21 | 22 | 19 | 23 | 13 |
Social sciences | 65 | 68 | 67 | 28 | 0 |
Other | 451 | 455 | 444 | 0 | 61 |
NOTE:
- . = data were not collected at this level or institution was not eligible to participate for this survey year.
- Data from the Survey of Science and Engineering Research Facilities is collected every two years.
Field | Planned to start in FY 2022 or FY 2023 | Started in FY 2020 or FY 2021 | Started in FY 2018 or FY 2019 | Started in FY 2016 or FY 2017 | Started in FY 2014 or FY 2015 |
---|---|---|---|---|---|
All research space | . | 31,358 | 9,118 | 18,151 | 6,600 |
Biological and biomedical sciences | . | . | . | . | 1,350 |
Geosciences, atmospheric sciences, and ocean sciences | . | . | . | . | 5,250 |
Other | . | 31,358 | 9,118 | 18,151 | . |
NOTE:
- . = data were not collected at this level or institution was not eligible to participate for this survey year.
- Data from the Survey of Science and Engineering Research Facilities is collected every two years.
Field | Planned to start in FY 2022 or FY 2023 | Started in FY 2020 or FY 2021 | Started in FY 2018 or FY 2019 | Started in FY 2016 or FY 2017 | Started in FY 2014 or FY 2015 |
---|---|---|---|---|---|
All research space | 2,567 | 22,101 | 6,185 | 3,367 | 6,828 |
Agricultural sciences | 0 | 0 | 0 | 0 | 0 |
Biological and biomedical sciences | 0 | 0 | 0 | 665 | 847 |
Computer and information sciences | 0 | 0 | 0 | 0 | 0 |
Engineering | 0 | 0 | 0 | 792 | 0 |
Geosciences, atmospheric sciences, and ocean sciences | 0 | 313 | 285 | 0 | 0 |
Health sciences | 2,567 | 8,102 | 2,691 | 880 | 1,463 |
Mathematics and statistics | 0 | 0 | 0 | 0 | 0 |
Natural resources and conservation | 0 | 0 | 0 | 0 | 0 |
Physical sciences | 0 | 742 | 254 | 0 | 0 |
Psychology | 0 | 0 | 0 | 0 | 0 |
Social sciences | 0 | 0 | 0 | 778 | 4,518 |
Other | 0 | 12,944 | 2,955 | 252 | 0 |
NOTE:
- . = data were not collected at this level or institution was not eligible to participate for this survey year.
- Data from the Survey of Science and Engineering Research Facilities is collected every two years.