| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 4 |
1.6%
|
| -8 | Refusal (spontaneous) | 9 |
3.5%
|
| 1 | Yes | 41 |
16%
|
| 2 | No | 203 |
79%
|
| Sysmiss | 355 |