The overall stats like "miles driven per accident" are probably the closest you'll get to this. Obviously Tesla bangs the drum every time figures come out in it

The overall stats like "miles driven per accident" are probably the closest you'll get to this. Obviously Tesla bangs the drum every time figures come out in its favour. There is a level of incompleteness in the data and also some gray areas around the methodology that Tesla uses. But the overall figures do tend to indicate that Teslas using Autopilot and/or active safety features are safer than the average for cars (based on NHTSA and Tesla's reporting on Autopilot and/or active safety feature use). If Tesla released more detailed data and its methodology it would be more helpful to see how significant this analysis is.