J322Y
Contributor
One reason could be frequency of dives. If old divers go out 4 times as often, then they would be much more visible...Interesting to see that there's "many" in 20-35 range, yet when I look at the local dive boats, or local facebook groups of people looking for buddies, I've hardly come across people that weren't twice my age.
When I was in Australia, it was quite different though, and there were quite a bit more 20-30 yo divers...