I'm a little puzzled by this table, though. Surely they don't mean to suggest that a full 54.8 percent of American cheerleaders ended up in the emergency room in 1998?
I can't vouch for the methodology, since obviously these numbers don't make sense at all, but it does seem to be suggest that people who do martial arts (as a broad, undifferentiated category) are less likely to be seriously injured than people who play basketball, soccer, football, or softball. Volleyball and weight-lifting, too, would seem to be riskier. Predictably, rugby and and hockey involve very high rates of injuries. Less predictably, "Track & Field" appears to be nearly lethal: You'd have to be mad to get messed up in that world.
Very strangely, it appears to be safer to take up the martial arts than to take up dancing.
Anyway, I'm glad to report that I made it off the basketball court unharmed. I had no idea how much danger I was in.