I remember realizing that there didn't seem to be any older people around. A mentor pointed out to me "just because you don't see them doesn't mean they aren't

I remember realizing that there didn't seem to be any older people around. A mentor pointed out to me "just because you don't see them doesn't mean they aren't around." To your first sentence: I, also, would be very interested in a statistical analysis of where the 20-somethings of each decade ended up.