An age-based criterion for computer knowledge would write off Donald Knuth, while counting a tween that only knew snapchat as an expert. To be honest I'm not sure how useful the list of ages would be.
I'm guessing that a quick Google of "116th Congress ages" didn't turn up a single preformatted source in the desired format in the first few links.
[0] Just threw this together to start playing with hosting using S3: http://howoldiscongress.com/ (Yes, I know that's absurd precision. wip and all.)