"From 2008 through 2010, the overall rates for adult and adolescent males and females decreased. The numbers of deaths of males with stage 3 (AIDS) whose HIV infection was attributed to injection drug use, to male-to-male sexual contact and injection drug use, and to heterosexual contact decreased. The numbers of deaths of males with infection attributed to male-to-male sexual contact and to perinatal transmission remained stable. Among adult and adolescent females, the numbers of deaths of those with infection attributed to injection drug use and to perinatal transmission decreased. The number of deaths of females with infection attributed to heterosexual contact remained stable. Trend data for persons with infection attributed to perinatal transmission should be interpreted with caution because numbers are small."

Source

Centers for Disease Control and Prevention. HIV Surveillance Report, 2011, "Rates of diagnoses of HIV infection among adults and adolescents, by area of residence, 2011—United States and 6 dependent areas"; Vol. 23, pp. 8-9. Published February 2013. Accessed May 21, 2013.
http://www.cdc.gov/hiv/pdf/st…