I remember having read a few years ago something along the lines of:
injury risks among novice sports practitioners increase when they gain confidence -- due to a perceived skill level above their actual skill level.
To check that statement, I'm looking for some open data that associate accident events with the reported skill level of the practitioner. It doesn't matter if the skill level is assessed as some categorical (ex: "novice/advanced/expert/pro") or continuous data (ex: "years of practice").
Ideally, I would like data related to accidents in "action sports" like skateboard, roller, kitesurf, or alike where " poor execution of the activity has to result in considerable risk of serious physical harm to the participant" (to quote wikipedia)
I will use the data to plot a graph for illustration purposes. I will not perform a deep or formal analysis of them. So, moderately reliable sources should be acceptable. I would prefer data from European countries or North America.
FWIW, Isearch through Google and https://catalog.data.gov but I didn't find any dataset recording the "skill level" of victims of sport accidents. But I'm outside of my field, so I may have lacked the proper keywords.