About 15 years ago I volunteered with a pitbull rescue, then did a bunch of research on pitbull attacks in grad school. The problem then was that most statistics like this were unreliable once you saw what they labeled a pitbull. In most cases it was just any “mutt” was considered a pitbull. I don’t know if things have changed, never really looked into it since then, but I’m still a bit wary of stats like this without knowing their data is accurate.