This document summarizes the number of doctoral degrees awarded in the United States between 1920 and 1990 by academic discipline, undergraduate institution, and time period. The data include 914 private, four-year, non-doctoral degree-granting institutions. Individual institutional data are included for a maximum of 360 colleges and universities in the discipline rankings. The document also features a section summarizing total doctoral activities by discipline, gender, and time period, across all institutions in the sample. Analysis of the data indicate that the average number of doctorates granted annually to baccalaureate graduates of private, non-doctoral-granting institutions has dramatically increased in recent years. The fields in which the largest numbers of doctoral degrees were granted include Computer Sciences; Professional/Other Fields; Other Social Sciences (including Area Studies, Criminology, Demography, Geography); Psychology; and Education. Slowest growing fields are History, Mathematics, Physics and Astronomy, and Foreign Languages. Degrees earned by women continue to account for an increasing share of all doctorates. Appendixes contain an alphabetical listing of the 914 institutions, a list of academic fields, and a list of definitions of academic fields. (GLR)