Does anyone have a figure, based on some solid information, on how many trips underground cavers make in a year? Did NSS ever do a study or survey of same?
Or does anyone have figures that could be used to estimate that number? It could be:
1- Reported trips per caver?
2- Reported trips per grotto?
3- Total estimated trips by all NSS members
4- Total estimated trips by all cavers
5- Other figure.
If someone has a realistic figure based on their grotto’s trips and participation, that would be a great start (i.e., something akin to: Our 50-member grotto had 450 person-trips underground last year).