| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 12 |
3%
|
| -8 | Refusal (spontaneous) | 31 |
7.8%
|
| 1 | Yes | 38 |
9.6%
|
| 2 | No | 316 |
79.6%
|
| Sysmiss | 926 |