1 per year was for fatal attacks, not just attacks in general. Yes, the case fatality rate for shark attacks is probably much higher than for dog attacks. But if you are considering non-fatal attacks, if there were 13 shark attacks in 2019, how many thousands of dog attacks do you think that there were?
I know that I read something about an attack on a scuba diver a while ago, but those are much less common than attacks on surfers/swimmers. It sounds like this wetsuit wasn't designed with scuba divers in mind.