| Value | Category | Cases | |
|---|---|---|---|
| 1 | Grade 5 or less | 1936 |
20.6%
|
| 2 | Grade 6 | 2301 |
24.5%
|
| 3 | Grade 7 | 2167 |
23.1%
|
| 4 | Grade 8 | 1742 |
18.5%
|
| 5 | Grade 9 | 1223 |
13%
|
| 6 | Grade 10 or above | 27 |
0.3%
|
| Sysmiss | 243 |