| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1. higher grade | 2 |
2.7%
|
| 2 | 2. standard grade | 6 |
8.2%
|
| 3 | 3. lower grade | 1 |
1.4%
|
| 7 | 7. did not take | 58 |
79.5%
|
| 9 | 9. don't know | 6 |
8.2%
|
| Sysmiss | 926 |