Get a grip Ed, in 1985 HIV/Aids was almost exclusively amongst MSM.
The disease began to affect the heterosexual community to a greater extent (but nothing like MSM rates) up until the mid 90's, when heterosexual rates began to fall and have been falling ever since.
MSM rates are continuing to rise, and will soon be back at the 1985 figure of 80%....BUT THE REAL NUMBERS OF INFCTIONS WILL BE MANY TIMES HIGHER.