| Value | Category | Cases | |
|---|---|---|---|
| 1 | 6th grade primary | 2 |
0.1%
|
| 2 | 1st grade secondary | 81 |
5.7%
|
| 3 | 2nd grade secondary | 523 |
36.7%
|
| 4 | 3rd grade secondary | 458 |
32.1%
|
| 5 | 4th grade secondary | 332 |
23.3%
|
| 6 | 5th grade secondary | 30 |
2.1%
|
| Sysmiss | 15 |