According to a mdwfp chart based off of one of their surveys on one of the big four this is what a typical crappie fishery looks like. Forget the specific numbers, they are relative. Someone tell me how you are going to "fish out a fishery".

0"-2" 1,000,000
2"-4" 500,000
4"-6" 250,000
6"-8" 125,000
8"-10" 62,500
10"-12" 31,250
12"-14" 15,625
14"-16" 7812
16"-18 3906