| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 18 |
2.7%
|
| -8 | Refusal (spontaneous) | 20 |
3%
|
| 1 | Yes | 178 |
26.9%
|
| 2 | No | 445 |
67.3%
|
| Sysmiss | 435 |