I don't believe that number...
Sit down most average Joe or Jane American and without the pressure of PC, the vast number would say "I really don't know" or "Are you stupid, of course not ! "
There have been several studies of identical twins, (I am one) meaning both have the same DNA when conceived and there is no correlation between being gay and the DNA you carry...
Identical twins would have a much higher rate of both being homosexual and they don't...
Public Schools have been very busy propagandizing your kids, teachers either get on board or change professions.