Yes it does, so lets add the number of people who take to the water in Ireland into the US/UK statistics. Im sure the percentage ratio of prop strikes per number of hours spent on the water will drop even further.
Sorry Wiilk but the argument here is that death or serious injury as a direct result of not wearing
the KC is actually very rare therefore not justifying legislation/regulation etc...
In the first example you listed, the poor bloke admitted that he set out to sea with a defective KC system hence the reason he didnt wear it.
If the KC system was operational, would he have used it? He was an experienced powerboater so i would like to think so.
In the second example no person was injured and the boat was later found on a beach.