In reply to mutt:
Very high level analysis then 2/3 of climbers of this parish do off-the-wall training when the facilities are available at the wall. But roughly 1/4 of those who want to do off the wall training don't have the facilities to do so at the wall.
Question then is how big is the set of those who aren't served well by their wall in that respect? Can anyone elucidate with daya?