| Value | Category | Cases | |
|---|---|---|---|
| 1 | 6TH Grade | 24 |
1.7%
|
| 2 | 7TH Grade | 481 |
33.7%
|
| 3 | 8TH Grade | 576 |
40.4%
|
| 4 | 9TH Grade | 346 |
24.2%
|
| Sysmiss | 24 |