| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 13 |
4.4%
|
| -8 | Refusal (spontaneous) | 3 |
1%
|
| 1 | Yes | 8 |
2.7%
|
| 2 | No | 271 |
91.9%
|
| Sysmiss | 944 |