20 something years...and this poll sort of matches the age poll, in that there is some bulging around 24-25 years, which means people started playing back in the day
when D&D was a phenomanon--and when the stuff that people still feel all that nostalgia for was coming out.
Still, the distribution here is flatter. One reason: some people are not counting long breaks in playing, and the pole is set up a little differently, hmm