Inndeling
0
0
Fravær
1
1
Forekomst
0
0
0
1
1
0–1/32
10
10
>8–16
11
11
>16–32
12
12
>32–64
13
13
>64–128
14
14
>128–256
15
15
>256
2
2
1/32–1/16
3
3
1/16–1/8
4
4
1/8–1/4
5
5
1/4–1/2
6
6
1/2–1
7
7
>1–2
8
8
>2–4
9
9
>4–8