What's the LGBT % population?

I'd really REALLY like to know this. Some Webpages say it's a 5%, others say 20%, I honestly don't know.Please take in mind that:1.There are A LOT of closet cases, even men married with woman due to fear of being rejected socially.There are people who just dont LABEL themselves, or are "Straight" but would fall in love with a guy after a Comrade-like relationship, or maybe just curious or whatever.Transexual ppl are included in "LGBT", just for some people to know.