The National Health Interview Study reported in July 2014 that 1.6 percent of Americans identify as gay or lesbian, and 0.7 percent identify as bisexual.
If
it seems to you that the percentage of gay actors is higher, then it
may either be that gay people are more attracted to the arts, or that
actors receive more publicity than the average person and therefore you
hear more about gay actors than you do, say, gay plumbers or gay grocery
clerks, giving you a false impression that there are more gay actors
than there actually are. This is not to say that being gay is good bad or what ever. Its just a fact that in the Theatrical industry there is a much larger percentage of homosexuals than in many other trades.