| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 20 |
5%
|
| -8 | Refusal (spontaneous) | 6 |
1.5%
|
| 1 | Yes | 22 |
5.4%
|
| 2 | No | 356 |
88.1%
|
| Sysmiss | 1591 |