More like 2.5% at most are homosexual men. And the chart is intentionally deceiving. You can lump the men who think they're "women" in with the men category, as well as the men/women "bi's." That's well over 60%.
That was my belief as well, so before posting that chart for the first time I went internet searching, and came up with 5-6% from several sources. There has apparently been a large recent increase in homosexuality and bisexuality, especially among the young.
I just went searching again, and found sexuality numbers all over the place, depending on source.
I give up on the search. I have spent too much time on the subject.
The chart documents that homosexuals and bisexuals are largely responsible for the surge in syphilis. That's the reason I posted it, and it does the job.