I think part of the reason that we don’t have those numbers is that there is in general not that many geriatric roofers, or geriatric craftsmen for that matter. Most physical crafts takes a toll on the body, and while it has gotten a lot better in recent decades with machines doing most of the heavy lifting, the people retiring now will still have decades of bad lifting and old injuries. I think only farmers have a higher incident rate than craftsmen.

Every single craftsman I know have abandoned their craft for something else because of body issues or injuries. Also, you’re nowhere as nimble at 50, 60 or 70 as you were when you were 20 or 30, so the risk of work related accidents increases, assuming you’re still doing the same tasks.