Those databases (or whatever they are, because you don't remember exactly) have been referred to repeatedly in this thread. It turns out they don't say what you've been told they said. This, too, has been belabored repeatedly in this thread.
That's one of the huge problems with trans rights discourse right now, and a huge win for trans rights activism: the general impression in popular culture, that certain things have been researched, and that they have been told the truth about those things. Even though they have only the vaguest recollection of what that research might have been, and no idea at all if it reached the conclusions they vaguely remember being told were true.