case stumps larvae
1  2 10
2  2 30
3  1 12
4  3 24
5  3 36
6  4 40
7  3 43
8  1 11
9  2 27
10 5 56
11 1 18
12 3 40
13 2 25
14 1  8
15 2 21
16 2 14
17 1 16
18 1  6
19 4 54
20 1  9
21 2 13
22 1 14
23 4 50