FIGURE TS-1D Number of doctorates awarded, by field and citizenship, 1985-2003. US citizens and permanent residents earn on average about 60-70% of S&E doctoral degrees; about 80% in life sciences and social sciences, 60% in physical sciences, and 50% in engineering and mathematics and computer sciences.
SOURCE: National Science Foundation. Survey of Earned Doctorates. Arlington, VA: National Science Foundation, 2005.