Here is is an
article quoting FAA statistics of accidents vs. age of the pilot.
----- Start quote --------
..... a Federal Aviation Administration study obtained by Team 4 shows that pilots in their 20s have, by far, the highest accident rate:
89 percent higher than pilots in their 30s
59 percent greater than pilots in their 40s
62 percent higher than pilots in their 50s
----- End quote --------
I am not clear whether they are talking about pilots or commercial pilots.