| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 3 |
2.7%
|
| -8 | Refusal (spontaneous) | 4 |
3.6%
|
| 1 | Yes | 7 |
6.4%
|
| 2 | No | 96 |
87.3%
|
| Sysmiss | 1322 |