What percent of men who cross-dress are gay?

Because transvestism is so highly stigmatized in most cultures, it is difficult to get a true percentage of the population who engages in crossdressing. However, what studies have found is that, it appears that actually most crossdressers are heterosexual men, usually married with children. However, of course, there are crossdressers from all genders and all sexual orientations. I apologize for not being able to give you more specific numbers.