So, we don't have all the offical numbers for things but we can take a crack at this

https://lexfridman.com/tesla-autopilot-miles-and-vehicles/ Lex Fridman, a MIT Research Scientist has sat down with the sales figures and the AP miles driven numbers tesla has occasionally given out, and at the last update he posted, there would have been roughly 1.8 billion miles driven between 4-22-2020 and 1-1-2021. For a full year this is 2.662 billion miles. or 221.9m per month.

https://www.nhtsa.gov/sites/nhtsa.gov/files/2022-06/ADAS-L2-SGO-Report-June-2022.pdf

NHSTA says over the course of 10 months, there have been two confirmed ADAS related accidents into first responder vehicles.

https://smartfinancial.com/average-miles-driven-per-year

If you take the 12785 miles per driver 2020 average which they calculated by doing the math against the 2020 FHA report. There are 228m drivers, so this is 243b a month

https://www.workzonebarriers.com/emergency-response-firetruck-collision-crash-facts.html

This report shows that 2500 trucks a year parked as blockers get hit. 250 per month

250 accidents per month / 243000 million miles = .001

.2 accidents a month / 222 million miles = .0009

So if you take all the different reports in context of each other. Non tesla AP hits .001 fire trucks per million miles driven. Tesla AP hits .0009 firetrucks per million miles driven.

Tesla AP is slightly better than all humans + other AP systems. If we replaced everything else with Tesla AP, we would have reduced the accident count by 291.5