| Value | Category | Cases | |
|---|---|---|---|
| 0 | 4 |
4%
|
|
| 12 | 1 |
1%
|
|
| 9 | 1 |
1%
|
|
| N1 | 12 |
11.9%
|
|
| N12 | 2 |
2%
|
|
| N2 | 72 |
71.3%
|
|
| N3 | 5 |
5%
|
|
| N4 | 4 |
4%
|