| Value | Category | Cases | |
|---|---|---|---|
| 1 | First preparatory | 994 |
39.2%
|
| 2 | Second preparatory | 643 |
25.4%
|
| 3 | Third preparatory | 895 |
35.3%
|
| 4 | Other | 4 |
0.2%
|
| 5 | Ungraded or other grade | 0 |
0%
|
| Sysmiss | 32 |