| Value | Category | Cases | |
|---|---|---|---|
| N1 | 9 |
16.4%
|
|
| N2 | 23 |
41.8%
|
|
| N3 | 7 |
12.7%
|
|
| N4 | 13 |
23.6%
|
|
| N5 | 1 |
1.8%
|
|
| N6 | 2 |
3.6%
|