| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 3 |
3.4%
|
| -8 | Refusal (spontaneous) | 1 |
1.1%
|
| 1 | Yes | 1 |
1.1%
|
| 2 | No | 82 |
94.3%
|
| Sysmiss | 511 |