| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 8 |
3.8%
|
| -8 | Refusal (spontaneous) | 4 |
1.9%
|
| 1 | Yes | 20 |
9.6%
|
| 2 | No | 176 |
84.6%
|
| Sysmiss | 9168 |