For mine, I was one of only four, though one guy's wasn't even totally official: 4:43, 4:49, 4:59, 4:59. We could have easily had one more (my friend who was a 1:59 800 runner). Class size was 214. I always thought we were a weak distance running school - there were lots more basketball players who probably could do it if they put in a season of training - but then again maybe 5/214 isn't so terrible. What about other people's?
Oh and PE/conditioning miles not run on a track don't count - those are almost always short...