| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 3 |
3.7%
|
| -8 | Refusal (spontaneous) | 3 |
3.7%
|
| 1 | Yes | 1 |
1.2%
|
| 2 | No | 74 |
91.4%
|
| Sysmiss | 187 |