| Value | Category | Cases | |
|---|---|---|---|
| N1 | 560 |
78.9%
|
|
| N2 | 98 |
13.8%
|
|
| N3 | 27 |
3.8%
|
|
| N4 | 17 |
2.4%
|
|
| N5 | 3 |
0.4%
|
|
| N6 | 5 |
0.7%
|