| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 4 |
1%
|
| -8 | Refusal (spontaneous) | 30 |
7.2%
|
| 1 | Yes | 84 |
20.2%
|
| 2 | No | 297 |
71.6%
|
| Sysmiss | 604 |