1

4-6

4.75-3.35

2

6-8

3.25-2.36

3

8-10

2.36-1.7

4

10-20

1.7-0.83

5

20-40

0.83-0.38

6

40-70

0.38-0.212

7

70-120

0.212-0.12

8

120-200

0.12-0.075

9

200+

<0.075