| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 4 |
2%
|
| -8 | Refusal (spontaneous) | 6 |
3%
|
| 1 | Yes | 44 |
21.8%
|
| 2 | No | 148 |
73.3%
|
| Sysmiss | 817 |