Well, you're not going to get an accurate representation of that, not with the way the population shifts around. I can say that I know of at least seven offhand, then there are others who don't necessarily consider what they can do as a magical power, and that still leaves the rest. It's probably a fairly even ratio, all things considered, mostly erring on the middle range of these concepts possibly existing, but due to the perception of it, it's hidden from view.