The CDC estimates that of the 11,923 male adults or adolescents with diagnosed HIV infection which was ever classified as stage 3 (AIDS) who died in 2010, 5,980 of the cases were reportedly transmitted through male-to-male sexual contact (MSM), 2,907 were reportedly transmitted through injection drug use, 1,258 were reportedly transmitted through male-to-male sexual contact and injection drug use, 1,654 were reportedly transmitted through heterosexual contact, 26 were reportedly transmitted through perinatal exposure, and 97 were attributed to "other."

The CDC estimates that of the 4,170 female adults or adolescents with diagnosed HIV infection which was ever classified as stage 3 (AIDS) who died in 2010, 1,563 were reportedly transmitted through injection drug use, 2,540 were reportedly transmitted through heterosexual contact, 38 were reportedly transmitted through perinatal exposure, and 29 were attributed to "other."

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, Table 12b, pp. 46-47. Published February 2013. Accessed May 21, 2013.
http://www.cdc.gov/hiv/pdf/st…