C  10.1 - 12.0
D  12.1 - 14.0
E  14.1 - 16.0
G  18.1 - 20.0
H  20.1 - 22.0
F  16.1 - 18.0
B  8.1 - 10.0
I  > 22.0
A  < 8.1