| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1. higher grade | 19 |
38.8%
|
| 2 | 2. standard grade | 7 |
14.3%
|
| 3 | 3. lower grade | 0 |
0%
|
| 7 | 7. did not take | 23 |
46.9%
|
| 99 | 99. don't know | 0 |
0%
|
| Sysmiss | 50 |