| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 7 |
4.8%
|
| -8 | Refusal (spontaneous) | 16 |
10.9%
|
| 1 | Yes | 28 |
19%
|
| 2 | No | 96 |
65.3%
|
| Sysmiss | 451 |