Waymos crash less than human drivers

OT, but does anyone know what the shape of the curve for the number of automobile crashes per human driver? Is it uniform distribution, where everyone is more or less likely to get into, say, 1.2 fender-benders per lifetime? Or there is a cluster of people who are much more likely to be involved in crashes? I suppose automobile insurance companies would have this type of information.

I'm willing to bet it's the latter. There's a reason your premiums go up after you get into an accident. Insurance companies are betting that you are going to have more of them.