Tesla reports the accidents per million miles each quarter:
So using the 'none' as the background, accident rate, I subtracted it out to see how progress is working:
I've had ~4 firmware updates and with each one, Autopilot has gotten smoother, more predictable, and fun. For example, the first release would hug the lane line on a right curve, uncomfortably close. Today, it stays in the middle as expected. Not perfect but getting better with each release.
Bob Wilson

So using the 'none' as the background, accident rate, I subtracted it out to see how progress is working:

I've had ~4 firmware updates and with each one, Autopilot has gotten smoother, more predictable, and fun. For example, the first release would hug the lane line on a right curve, uncomfortably close. Today, it stays in the middle as expected. Not perfect but getting better with each release.
Bob Wilson