This thread confuses me quite a bit since conflicting information is floating around. From my experience, and I don't keep statistics to back it up, just feeling when training my players, I am more inclined to the brackets 18-21, 22-25, 26-29, 30+.

I am feeling very uneasy since I have to work with my players everyday but I don't know for sure what's right.

Can anyone have a definite answer to put this issue to rest? Thank you.