| Value | Category | Cases | |
|---|---|---|---|
| 0 | 2 |
0.3%
|
|
| N1 | 156 |
24.8%
|
|
| N2 | 167 |
26.5%
|
|
| N3 | 142 |
22.5%
|
|
| N4 | 85 |
13.5%
|
|
| N5 | 48 |
7.6%
|
|
| N6 | 16 |
2.5%
|
|
| N7 | 9 |
1.4%
|
|
| N8 | 5 |
0.8%
|