<p>The list is from the National Science Foundation Survey of Earned Doctorates. [nsf.gov</a> - NCSES Survey of Earned Doctorates - US National Science Foundation (NSF)](<a href=“http://www.nsf.gov/statistics/srvydoctorates/]nsf.gov”>Survey of Earned Doctorates (SED) 2021 | NSF - National Science Foundation)</p>