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ON_ROPE wrote:Registration data going back to 1980 show a rather standard percentage of cavers entering Pettyjohns cave in Georgia are NSS members. Current data show ten thousand cavers a year and slightly less than 20 percent are NSS. Do the math.
trogman wrote:Wow!10,000 people a year visit Pettijohns?! And that's just the number of people that actually register. I'm sure the actual number is even higher.
I imagine some of those are repeat visitors; meaning, they go to PJ more than once a year. It's kind of hard to extrapolate from that number to figure how many cavers in the country, though. I guess you could assume that the 20/80 ratio holds true for the rest of the country, and since there are ~10,000 NSS members, one could assume that there are around 40,000 non-NSS cavers, for a total of 50,000.
Trogman
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