For this report, the authors analyzed federal government data to look at gender, racial and ethnic diversity among those employed in and earning degrees in science, technology, engineering and math (STEM). Analysis of the STEM workforce is based solely on occupation, using data from the U.S. Census Bureau's 1990 and 2000 U.S. decennial censuses and aggregated 2014-2016 and 2017-2019 American Community survey data provided through Integrated Public Use Microdata Series (IPUMS) from the University of Minnesota. A 2018 Center report used the same occupation classifications to analyze the STEM workforce from 1990 to 2016. Analysis of STEM degrees awarded is based on data from the U.S. Department of Education's National Center for Education Statistics (NCES), Integrated Postsecondary Education Data System (IPEDS) Completions survey. The analysis was done using the National Center for Science and Engineering Statistics Interactive Data Tool. Postsecondary institutions participating in Title IV federal financial aid programs are required to report. Degree programs were classified using the NCES's Classification of Instructional Programs (CIP) scheme.