Data
U. Iowa
| Fields | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 | 2014 | 2013 | 2012 |
|---|---|---|---|---|---|---|---|---|---|---|
| All fields | 286 | 302 | 311 | 322 | 347 | 368 | 344 | 361 | 397 | 369 |
| Science and engineering | 216 | 206 | 224 | 237 | 247 | 244 | 234 | 258 | 264 | 265 |
| Science | 181 | 176 | 189 | 208 | 195 | 213 | 202 | 221 | 224 | 226 |
| Life science | 82 | 79 | 81 | 108 | 73 | 109 | 105 | 118 | 93 | 116 |
| Agricultural sciences | 1 | . | . | . | . | . | . | 2 | . | 1 |
| Biological sciences | 60 | 49 | 57 | 81 | 50 | 75 | 80 | 79 | 61 | 62 |
| Health sciences | 21 | 30 | 24 | 27 | 23 | 34 | 25 | 37 | 32 | 53 |
| Physical sciences and earth sciences | 36 | 32 | 37 | 41 | 39 | 34 | 24 | 34 | 34 | 38 |
| Chemistry | 20 | 21 | 23 | 23 | 23 | 18 | 12 | 22 | 20 | 24 |
| Earth, atmospheric, and ocean sciences | 4 | 5 | 5 | 5 | 6 | 6 | 1 | 4 | 4 | 4 |
| Physics and astronomy | 12 | 6 | 9 | 13 | 10 | 10 | 11 | 8 | 10 | 10 |
| Mathematics and computer sciences | 27 | 26 | 30 | 14 | 34 | 24 | 20 | 20 | 28 | 22 |
| Computer sciences | 7 | 9 | 10 | 1 | 6 | 4 | 10 | 3 | 8 | 7 |
| Mathematics | 20 | 17 | 20 | 13 | 28 | 20 | 10 | 17 | 20 | 15 |
| Psychology and social sciences | 36 | 39 | 41 | 45 | 49 | 46 | 53 | 49 | 69 | 50 |
| Psychology | 20 | 22 | 23 | 19 | 27 | 25 | 25 | 14 | 26 | 26 |
| Anthropology | 1 | 2 | 2 | . | 2 | 3 | 4 | 3 | 5 | 5 |
| Economics | 2 | 6 | 2 | 6 | 5 | 3 | 4 | 5 | 7 | 2 |
| Political science and government | 6 | 2 | 2 | 7 | 4 | 5 | 1 | 5 | 9 | 6 |
| Sociology | 1 | 2 | 2 | 3 | 1 | 2 | 6 | 6 | 8 | 2 |
| Other social sciences | 6 | 5 | 10 | 10 | 10 | 8 | 13 | 16 | 14 | 9 |
| Engineering | 35 | 30 | 35 | 29 | 52 | 31 | 32 | 37 | 40 | 39 |
| Biological/biomedical sciences | 5 | 5 | 9 | 3 | 13 | 8 | 7 | 9 | 10 | 14 |
| Chemical engineering | 1 | 4 | 5 | 5 | 2 | 2 | 6 | 2 | 4 | 5 |
| Civil engineering | 6 | 1 | 3 | 1 | 3 | 5 | 5 | 4 | 3 | 2 |
| Electrical engineering | 7 | 1 | 6 | 5 | 10 | 4 | 5 | 3 | 3 | 2 |
| Industrial engineering | 4 | 6 | . | 2 | 2 | 1 | 2 | 4 | 2 | 1 |
| Materials/metallurgical engineering | . | . | . | . | 1 | 1 | . | . | . | . |
| Mechanical engineering | 7 | 9 | 6 | 8 | 12 | 4 | 4 | 7 | 9 | 10 |
| Other engineering | 5 | 4 | 6 | 5 | 9 | 6 | 3 | 8 | 9 | 5 |
| Non-science and engineering | 70 | 96 | 87 | 85 | 100 | 124 | 110 | 103 | 133 | 104 |
| Education | 35 | 40 | 35 | 33 | 34 | 43 | 41 | 39 | 42 | 56 |
| Education administration | 2 | 3 | 1 | 2 | 4 | 2 | . | 3 | 4 | 8 |
| Education research | 22 | 24 | 26 | 20 | 19 | 26 | 28 | 22 | 28 | 33 |
| Teacher education | . | . | . | . | . | . | 1 | . | 1 | 3 |
| Teaching fields | 11 | 13 | 8 | 11 | 11 | 14 | 12 | 14 | 9 | 10 |
| Other education | . | . | . | . | . | 1 | . | . | . | 2 |
| Humanities | 19 | 38 | 32 | 35 | 42 | 53 | 44 | 43 | 55 | 36 |
| Foreign languages & literature | 1 | 5 | 3 | 3 | 5 | 7 | 4 | 4 | 11 | 2 |
| History | 1 | 6 | 4 | 5 | 8 | 12 | 7 | 11 | 7 | 5 |
| Letters | 11 | 10 | 11 | 15 | 11 | 18 | 18 | 12 | 17 | 7 |
| Other humanities and arts | 6 | 17 | 14 | 12 | 18 | 16 | 15 | 16 | 20 | 22 |
| Other | 16 | 18 | 20 | 17 | 24 | 28 | 25 | 21 | 36 | 12 |
| Business management/administration | 9 | 8 | 12 | 5 | 14 | 12 | 12 | 7 | 18 | 7 |
| Communication | 5 | 8 | 6 | 11 | 8 | 14 | 10 | 12 | 15 | 5 |
| Fields not elsewhere classified (nec) | 2 | 2 | 2 | 1 | 2 | 2 | 3 | 2 | 3 | . |
NOTES:
- . = 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
