| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 4 |
10%
|
| -8 | Refusal (spontaneous) | 7 |
17.5%
|
| 1 | Yes | 5 |
12.5%
|
| 2 | No | 24 |
60%
|
| Sysmiss | 558 |