| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1. higher grade | 2 |
4.2%
|
| 2 | 2. standard grade | 3 |
6.3%
|
| 3 | 3. lower grade | 0 |
0%
|
| 7 | 7. did not take | 43 |
89.6%
|
| 99 | 99. don't know | 0 |
0%
|
| Sysmiss | 51 |