gillwt	bodywt
1	159	14.4
2	179	15.2
3	100	11.3
4	45	2.5
5	384	22.7
6	230	14.9
7	100	1.41
8	320	15.81
9	80	4.19
10	220	15.39
11	320	17.25
12	210	9.52