0  10.9
 1   4.5
 2   3.9
 3   3.9
 4   4.0
 5   3.7
 6   2.9
 7   3.1
 8   3.5
 9   3.9
10   4.0
11   4.3
12   4.7
13   5.9
14   7.9
15  28.9