https://nces.ed.gov/programs/digest/d12/tables/dt12_310.asp

https://nces.ed.gov/programs/digest/d20/tables/dt20_318.20.asp

The annual number of “academic” and “professional” doctoral degrees awarded has increased 10-fold since 1960.

https://www.insidehighered.com/news/2021/12/03/survey-shows-annual-decline-number-phds-awarded

The number of “academic” doctoral degrees awarded has increased 5-fold since 1960.

The increase in degrees has been totally accounted for by “scientific and engineering” degrees awarded.

https://www.insidehighered.com/news/2021/12/03/survey-shows-annual-decline-number-phds-awarded

More details on the decline of humanities doctoral degrees.

https://www.amacad.org/humanities-indicators/higher-education/humanities-share-all-advanced-degrees-conferred

Detailed annual academic data.

https://ncses.nsf.gov/pubs/nsf22300/data-tables

Women Earned the Majority of Doctoral Degrees in 2020 for the 12th Straight Year and Outnumber Men in Grad School 148 to 100

Women earn an increasing share of doctoral degrees.

https://www.forbes.com/sites/michaeltnietzel/2021/10/13/ten-ways-us-doctoral-degrees-have-changed-in-the-past-20-years/?sh=1e23eef32a71

Minority identified individuals earn an increasing share of doctoral degrees.

https://www.census.gov/library/stories/2019/02/number-of-people-with-masters-and-phd-degrees-double-since-2000.html

The cumulative number of advanced degree holders continues to increase.