| Value | Category | Cases | |
|---|---|---|---|
| -9 | -9. Don't know | 0 |
0%
|
| -7 | -7. father and mother included | 2 |
50%
|
| 600 | 1 |
25%
|
|
| 800 | 1 |
25%
|
|
| Sysmiss | 95 |