Umm if your numbers aren't based on the number of people coming out as trans, then where do they come from???For those saying that the children were born in that way, let me refer you to the statistics. I did my research before coming here. If your child is born with gender dysphoria; the chance is 0.005% - 0.014% for males and 0.002% - 0.003% for females.
And with the current number of children and young teenagers coming out as trans does not match up with the numbers what so ever.
I don't think under 18s should be able to have huge permanent modifications done because they might regret it, but non-permanent changes like hairstyle, clothing, and maybe puberty blockers are perfectly okay.