| Value | Category | Cases | |
|---|---|---|---|
| 1 | First middle | 781 |
38.8%
|
| 2 | Second middle | 547 |
27.1%
|
| 3 | Third middle | 674 |
33.4%
|
| 4 | First preparatory | 13 |
0.6%
|
| Sysmiss | 32 |