| Value | Category | Cases | |
|---|---|---|---|
| N1 | 11 |
14.1%
|
|
| N2 | 36 |
46.2%
|
|
| N3 | 17 |
21.8%
|
|
| N4 | 13 |
16.7%
|
|
| N5 | 1 |
1.3%
|