| Value | Category | Cases | |
|---|---|---|---|
| N1 | 23 |
26.4%
|
|
| N2 | 14 |
16.1%
|
|
| N3 | 43 |
49.4%
|
|
| N4 | 3 |
3.4%
|
|
| N5 | 1 |
1.1%
|
|
| N6 | 3 |
3.4%
|