| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 49 |
2%
|
| -8 | Refusal (spontaneous) | 163 |
6.5%
|
| 1 | Yes | 472 |
18.8%
|
| 2 | No | 1820 |
72.7%
|
| Sysmiss | 16153 |