Look at the margins of error. Only the top 13 have less than +/- 100%, and everything from 14 down has the same number of hits. I would guess that number is what you get when a single hit goes through to the counter. In other words, user pages aren't viewed often enough for the sample size to be sufficient to draw meaningful statistics.
PS I've just checked the maths and can stop guessing. From 14 down each page has received one hit. 1 in 6000 hits are counted, so each hit is multiplied by 6000, and then divided by the number of days they've been counting, which is 21, and you get 6000/21=286.