| Value | Category | Cases | |
|---|---|---|---|
| 1 | 4 |
2.7%
|
|
| N1 | 131 |
87.9%
|
|
| N2 | 11 |
7.4%
|
|
| N3 | 2 |
1.3%
|
|
| N4 | 1 |
0.7%
|