About 59 million people did volunteer work at some point from September 2001 to September 2002. Slightly more than 1 in 4 persons age 16 and over volunteered.
The incidence of volunteering was higher among women (31.1 percent) than among men (23.8 percent). This relationship held across age groups, education levels, and other major characteristics.
Bureau of Labor Statistics, U.S. Department of Labor, The Economics Daily, Volunteering in the U.S. at https://www.bls.gov/opub/ted/2002/dec/wk3/art04.htm (visited February 02, 2023).