Nation-wide, only about 30% of kicks are made from 45+ yards (ball snapped from the 35 yard line) and the percentage quickly decreases as you move farther out. The 50% point happens around 37 yards (ball snapped from the 27 yard line). The data I have only shows the yardline where the ball was snapped, so you have to manually add the 10 yards of the end zone, and if you want to also add the ~7 yards where the tee goes you could do that too.
Bottom line is these are NOT chip-shot field goals that everyone else's kickers are making, and the majority of kickers with significantly higher percentages are kicking from much closer to the uprights.
The other 125 teams kick around 90% from 45+. Iowa state kickers bring that average down.