subject	sex	mass	rate
1	M	62.0	1792
2	M	62.9	1666
3	F	36.1	995
4	F	54.6	1425
5	F	48.5	1396
6	F	42.0	1418
7	M	47.4	1362
8	F	50.6	1502
9	F	42.0	1256
10	M	48.7	1614
11	F	40.3	1189
12	F	33.1	913
13	M	51.9	1460
14	F	42.4	1124
15	F	34.5	1052
16	F	51.1	1347
17	F	41.2	1204
18	M	51.9	1867
19	M	46.9	1439