| Value | Category | Cases | |
|---|---|---|---|
| 0 | 2 |
1.4%
|
|
| 160 | 1 |
0.7%
|
|
| ? | 127 |
85.8%
|
|
| N1 | 3 |
2%
|
|
| N2 | 7 |
4.7%
|
|
| N3 | 7 |
4.7%
|
|
| N4 | 1 |
0.7%
|