| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 3 |
3.4%
|
| -8 | Refusal (spontaneous) | 4 |
4.5%
|
| 1 | Yes | 17 |
19.3%
|
| 2 | No | 64 |
72.7%
|
| Sysmiss | 2867 |