0 0    0
10 0   0
10 3   0
15 3   0
15 10   0
2- 10   0
20 0    0
30 0    0
31 1    0
32 4    0
33 5    12
34 4    12
36 3     12
38 2     0
40 1     0
44 0.5   0
50 0     0
60 0     0