| Value | Category | Cases | |
|---|---|---|---|
| 0 | 1 |
0.6%
|
|
| 1 | 2 |
1.1%
|
|
| 2 | 8 |
4.6%
|
|
| ? | 127 |
72.6%
|
|
| N1 | 1 |
0.6%
|
|
| N2 | 12 |
6.9%
|
|
| N3 | 20 |
11.4%
|
|
| N4 | 3 |
1.7%
|
|
| N6 | 1 |
0.6%
|