| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 2 |
3.8%
|
| -8 | Refusal (spontaneous) | 5 |
9.6%
|
| 1 | Yes | 7 |
13.5%
|
| 2 | No | 38 |
73.1%
|
| Sysmiss | 976 |