| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 4 |
1.9%
|
| -8 | Refusal (spontaneous) | 6 |
2.9%
|
| 1 | Yes | 5 |
2.4%
|
| 2 | No | 193 |
92.8%
|
| Sysmiss | 156 |