| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 10 |
3.5%
|
| -8 | Refusal (spontaneous) | 12 |
4.2%
|
| 1 | Yes | 30 |
10.6%
|
| 2 | No | 232 |
81.7%
|
| Sysmiss | 2671 |