Most of the rolls are in the 1st level(0 - 9885), obviously, and the 2nd level(9886 - 9985), I would say I get at least once or twice per week. I have rolled in the 3rd level(9986 - 9993) enough times that it is noticeable, but not too sure on the exact frequency. I have rolled in the 4th level(9994 - 9997), about 6 times in the last year and the fifth level (9998 - 9999), twice. I have never hit the 5th, and highest level yet, but my girlfriend has one time, and that was within her first week after joining.