id   age       kills trials
1    65.8      17    64
2    62.5      30   105
3    60.8       3    24
4    58.8      29    48
5    57.0       3     9
6    55.5       30   97
7    54.7       45  107
8    53.8       34   37
9    50.5       16   97
10   48.5       33   64
11   46.7       37   48
12   41.4       10   17
13   39.7       33   72
14   39.5        6   12
15   39.0        2   11
16   36.7       10   28
17   34.5       24   46
18   35.0        3   33
19   32.6        0    8
20   32.7       34   70
21   32.0       12   45
22   32.0        2   12
23   31.0        2   11
24   29.8        5   18
25   30.0        9   22
26   28.0        2    4
27   26.7        1   13
28   24.2        0   10
29   22.0        1   16
30   21.5        3   31
31   21.0        1    7
32   19.9        0   32
33   18.0        0    8
34   17.0        0    3
35   16.5        1   12
36   17.0        0    3
37   56.0       19   47
38   20.0        2   11