0.0   0.0
20.0   7.4
38.7  -4.8
47.0   4.0
50.0  13.5
41.5  27.0
36.0  40.5
32.0  30.0
25.0  34.5
26.8  39.0
 9.0  34.5
 2.0  25.5
-7.5  20.0