What about male/female? Are young men more likely to cause damage than young women?
The metric is useless in the first place, this is "per licensed drivers", not "per driver-miles".
It's a certainty that men drive more miles than women, primarily for job purposes. The NHTSA doesn't give enough data to determine this. My guess is that it's split almost exactly evenly per-mile, but who knows, without the data?
https://crashstats.nhtsa.dot.gov/Api/Public/Publication/8134...