It wasn't my intention to set you on the defensive. 'Twas but an intended jest at the fantastically disparate perceptions that can be had. For me, riding a motorcycle (at least around Baton Rouge) would be borderline suicidal, but to most of the riders I know, diving underwater with nothing but a little bottle of air on your back is unfathomable idiocy of the highest degree.
Unfortunately, that does not seem to be the case. Of course, it is possible to consider documented cases of injury or death, but the baseline census numbers from which to build a comparison between various recreational activities simply do not exist. Nobody knows how many active divers there are, for example, and even less known (if such were possible) is the activity of those divers. (I can tell you without reservation that no person or agency outside myself has an accounting of where I have been diving this year, with what gear, and in what conditions.
)
In diving, about as close as we can come is an attempt at analysis of those divers and dives ending poorly, but the sample size is so small and the total population so unconstrained that analysis is limited at best. I find it quite fascinating to observe divers' and non-divers' perceptions of the the potential risks of diving.
Anyway, as for climbing... I am far more at home with depths than with heights, although lengths are probably even worse (hence my disinterest in cave diving
).