| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 14 |
5.8%
|
| -8 | Refusal (spontaneous) | 9 |
3.7%
|
| 1 | Yes | 38 |
15.7%
|
| 2 | No | 181 |
74.8%
|
| Sysmiss | 2713 |