This guy:
http://whatif.cincinatti.com/hd/PlayerProfile/Ratings.aspx?tid=0&pid=1902499
As an experiment I recuited a guy with WE of 10. I started him every game as a Freshman, Sophomore, and Junior. He is now a senior and I'm not starting him since I'm actually trying to win. Here is his progression per year:
Attribute(potential) / Initial rating / beginning of Soph year / beginning of Jun year / beginning of Sen year
Ath(medium) / 41 / 42 / 43 / 46
Spd(medium) / 49 / 51 / 52 / 54
Rbd(low) / 37 / 38 / 37 / 36
Def(high) / 41 / 44 / 48 / 52
Blk(high) / 10 / 12 / 16 / 20
LP(high) / 44 / 48 / 55 / 61
Per(high) / 46 / 50 / 55 / 58
BH(high) / 55 / 58 / 62 / 66
Pass(high) / 35 / 38 / 40 / 44
WE / 10 / 13 / 17 / 23
Stm(low) / 79 / 77 / 74 / 72
Dur(low) / 39 / 39 / 39 / 39
Hope that helps.