The one thing I have found about statistics, and this comes from a company auditor; more statistics just give you another method to find flaws, seldom are the improvements noted. maybe a bit cynical and certainly not a perfect statement.....

Didn't I read in Backpacker a few months back there was a guy who tracked all PLB responses for the last ten years or so? I don't have my copy anymore. Maybe it was just for injuries and not rescue.