Table 5-8
Top 5 state producers of Ph.D.s, by percentage of all Ph.D.s: 1920–99, 1920–24, and 1995–99
 
1920–99   1920–24   1995–99
State Percent   State Percent   State Percent
Top 5 states 40.0   Top 5 states 61.9   Top 5 states 37.3
New York 11.2   New York 20.9   California 11.5
California 11.1   Illinois 16.1   New York 8.8
Illinois 6.4   Massachusetts 11.7   Texas 6.4
Massachusetts 6.0   Maryland 6.7   Illinois 5.4
Pennsylvania 5.3   Wisconsin 6.5   Pennsylvania a 5.2
a1995–99 percentage for Massachusetts also rounds to 5.2%, but exact figure is 5.159% of all Ph.D.s, compared with Pennsylvania’s 5.243%. 
 
SOURCE: NSF/NIH/USED/NEH/USDA/NASA, Survey of Earned Doctorates and Doctorate Records File.
 
U.S. Doctorates in the 20th Century