Well, I meant that I didn't know the historical trend of LGBT suicide, that if it it's more prevalent now than years ago or if it's relatively the same. However, I've never questioned that LGBT Youth are more at risk for suicide and that more actually succeed than their straight counterparts.
Why? Because you're not safe anywhere. Not at school, not at church, not at home. Unless you're straight and fit the gender norms, you're stigmatized. And there's never a stigmatization that's harmless. You're constantly bombarded by what I'm lightly terming disapproval. You're not only imagining the hate of your peers and family, but you're risking actual hate as well. If some Conservative or Christian douche bag comes up to you and questions you about it, "Are you really hurting?" some people can't point to any specific signs that a straight person would look for. For many children, simply having a religious life is enough. Or having a straight marriage.
Imagine this: you come to school, you're a male, you're on the football team, running back, and you're breaking records. Everyone loves you. Then imagine coming through your school's doors one morning to be met by the Principal and being told, "You can't come dressed like that. Go home and change into a proper skirt and blouse." Oh yeah, that's right, you're being forced to dress like the opposite sex. And your parents are siding with the Principal, there's no legal resource for you, and your peers are pressuring you to get into the skirt. If you don't, you not only lose your family and friends, but you're not allowed to go to school no matter what contributions you can make.
That's what it's like for transgender kids. At one point do you think they think to themselves, "Oh, it's okay. It's sensible what they ask of me. I can't forget my silly fantasies and do what I'm told?"
Your question does what everyone does to LGBT youth everyday: forces them into heteronormitivity. These youths are not straight kids. There's often no place for them to go. They get bullied, they can't tell a teacher. Many have to take the bullying because if they speak up, they feel they risk admitting that they're queer. This is not regular harassment; it's actual suffocation.
Any Google search would've turned up the answers to your questions. Here's two links I found that link to studies:
http://gaylife.about.com/od/gayteens/a/gaysuicide.htmhttp://en.wikipedia.org/wiki/Teenage_suicide_in_the_United_States#LGBT_youthA resource I implore you to peruse is the Trevor Project website. Read the "Letters to Trevor" section. You'll come to understand why LGBT suicide is treated the way it is.