| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1. higher grade | 23 |
47.9%
|
| 2 | 2. standard grade | 11 |
22.9%
|
| 3 | 3. lower grade | 0 |
0%
|
| 7 | 7. did not take | 14 |
29.2%
|
| 99 | 99. don't know | 0 |
0%
|
| Sysmiss | 51 |