| Value | Category | Cases | |
|---|---|---|---|
| N1 | 18 |
32.7%
|
|
| N2 | 21 |
38.2%
|
|
| N3 | 10 |
18.2%
|
|
| N4 | 4 |
7.3%
|
|
| N5 | 2 |
3.6%
|