| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 6 |
2.7%
|
| -8 | Refusal (spontaneous) | 11 |
4.9%
|
| 1 | Yes | 7 |
3.1%
|
| 2 | No | 200 |
89.3%
|
| Sysmiss | 784 |