Well, many of you were wondering what the breakdown of attendance by attendee type is. Well, TRB 2014 is still going on, I asked the good folks at TRB and they were kind enough to send me some stats from last year (2013). I put them together for you in this neat little infographic (you know I love those). Enjoy.
As always, raw data is at the bottom. I reduced the number of categories to combine a bunch.