A  < 15.0
B 15.0 - 20.0
E 24.1 - 26.0
C 20.1 - 22.0
D 22.1 - 24.0
F 26.1 - 28.0
G 28.1 - 30.0
H 30.1 - 32.0
I  > 32.0