| Value | Category | Cases | |
|---|---|---|---|
| N1 | 1 |
3.4%
|
|
| N2 | 11 |
37.9%
|
|
| N3 | 9 |
31%
|
|
| N4 | 5 |
17.2%
|
|
| N6 | 3 |
10.3%
|