Table A-1 - Research doctoral degrees included in the Survey of Earned Doctorates: 2021–25
Table A-2 - Survey response rates: 1970–2025
Table A-3 - Survey item response rates: 2019–25
Table A-4 - SED field of doctorate taxonomy, by SED-CIP series/codes: 2025
Table A-5 - Doctoral SED-CIP code to current and trend field taxonomies: 2025
Table A-6 - Historical SED-FOS code crosswalk to trend broad and major fields for data collected prior to SED 2021: 2025
Table A-7 - Comparison of the current field taxonomy to the trend field and the historical field taxonomies, by field level: 2025
Table B-1 - SED data table crosswalk: 2020 vs. 2021–present
