Number of levels = 36
16 <= 0
17 0 0.1
18 0.1 0.5
19 0.5 2.5
20 2.5 5
21 5 7.5
22 7.5 10
23 10 12.5
24 12.5 15
25 15 17.5
26 17.5 20
27 20 22.5
28 22.5 25
29 25 27.5
30 27.5 30
31 30 32.5
32 32.5 35
33 35 37.5
34 37.5 40
35 40 42.5
36 42.5 45
37 45 47.5
38 47.5 50
39 50 52.5
40 52.5 55
41 55 57.5
42 57.5 60
43 60 62.5
44 62.5 65
45 65 67.5
46 67.5 70
47 70 72.5
48 72.5 75
49 75 77.5
50 77.5 80
51 80 >