Old enough to know that this has been asked before: https://news.ycombinator.com/item?id=2322031 https://news.ycombinator.com/item?id=517039 https://news.ycombinator.com/item?id=126923
Went from a couple hundred answers in 2008-2011 to +3000 today, and counting.
The distribution doesn't seem to have changed much other than the current fool answers, hard to tell since the charts are not in absolute scale. Would be cool to aggregate all the years for comparison, but I have no idea how to merge the age ranges.
Script used to get the data: https://gist.github.com/ricardobeat/5370218