| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 7 |
5.1%
|
| -8 | Refusal (spontaneous) | 3 |
2.2%
|
| 1 | Yes | 16 |
11.7%
|
| 2 | No | 111 |
81%
|
| Sysmiss | 1185 |