Check out this video. Probably worth your time to watch - maybe present it at the club. It is a good "refresher" and "thought provoker".
The presenter does show some interesting OSHA based facts but also compares "an estimate for world wide hams".
The "meat" of the presentation starts at 3 min 57 seconds.
Do you know about the "DUAL fall restraint"? That seems to be a relatively new requirement by OSHA.
https://www.youtube.com/watch?v=uJO-L3td_p8&feature=youtu.be
Also - near the end he talks about zerofall.org. Prices seem pretty good.
I don't much climb anymore but may "take the zerofall pledge" as an educator and programme presenter for our local club.