According to the report,
In recent years, the number of PhDs awarded declined among all the large disciplines except communication (where it rose by 5% from 2012 to 2020)… Programs in history and philosophy experienced the largest declines from 2012 to 2020 (falling 12% and 10% respectively).
After a slow and steady increase from 1998 through 2011, the number of PhDs conferred in philosophy in the United States has been decreasing, according to a report from Humanities Indicators.
The full report, which has data on various aspects of graduate education in the humanities in the U.S., is here: State of the Humanities 2022: From Graduate Education to the Workforce.