Between 1990 and 1996, the number of women convicted of drug felonies increased by 37% (from 43,000 in 1990 to 59,536 in 1996). The number of convictions for simple possession increased 41% over that period, from 18,438 in 1990 to 26,022 in 1996.

Source

Greenfield, Lawrence A., and Snell, Tracy L., Bureau of Justice Statistics, Women Offenders (Washington, DC: US Department of Justice, December 1999), p. 5, Table 11.
http://www.bjs.gov/content/pu…