Well, we do not know who has authored this chart and if the data is really coming from the NTSB.
I have downloaded the "AviationAccidentStatistics_2003-2022_20231228.xlsx" file available on the
NTSB statistical reviews page.
A very simple query on the Flight regulation column relating to "Part 121: Air carrier" operations shows that during this period incidents/accidents for A and B were:
- 88 for A
- 296 for B
Of course, these raw numbers do not tell us anything as they should be crossed with the number of A and B A/C flying under Part 121 operations in each year from 2003 to 2022.
I don't know where to find such data but I am pretty sure that some of you will be able to do so
