The amount of your people in the congs are diminishing FAST!
Its very rare for me to go to a hall and find young people my age (early 20's)
I usually see it like this: By age 18 there are those who are still in and if they have not left by the time they graduate from high school then they will probably be the next generation of DUB fantics.
But the majority of those who do leave usually don't come back.
I find "young people" who are usually in their mid-teens (13- 18 ) and older ones who are in their mid-20's (23-27 etc) But never in the middle.
I'm the only one in my hall who's my age.