Within the American prison system, HIV became more prevalent among women than among men. According to the U.S. Department of Justice, from 1991 to 1998 the number of women prisoners with HIV increased by 69%, while the equivalent figure among male prisoners decreased by 22% during the same time period. The New York State Department of Health stated in 1999 that women entering New York state prisons had twice as high of an HIV rate as men entering New York state prisons. At the end of the year 2000 women in U.S. state prison systems had a 60% higher likelihood of carrying HIV than men in American state prison systems. According to HIV in Prison by the Bureau of Justice Statistics, in 2004 2.4% (1 in 42) of women in American prisons had HIV, while 1.7% (1 in 59) of men had HIV.
