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Table A-19. Imputed amounts for headcount of R&D personnel, by type of personnel: FY 2018

Type of personnel All R&D personnel Imputed amount Imputed amount as % of total
All personnel 947,643 89,370 9.4
Principal investigators 163,638 10,127 6.2
Other personnel 784,005 74,001 9.4
NOTE: This table includes only institutions reporting $1 million or more in total R&D expenditures in FY 2017. Institutions reporting less than $1 million in total R&D expenditures in FY 2017 completed a shorter version of the survey form in FY 2018 that did not include this question.
SOURCE: National Center for Science and Engineering Statistics, National Science Foundation, Higher Education Research and Development Survey, FY 2018.