| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 3 |
1.7%
|
| -8 | Refusal (spontaneous) | 4 |
2.3%
|
| 1 | Yes | 5 |
2.8%
|
| 2 | No | 164 |
93.2%
|
| Sysmiss | 1397 |