| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 2 |
1.9%
|
| -8 | Refusal (spontaneous) | 3 |
2.9%
|
| 1 | Yes | 18 |
17.3%
|
| 2 | No | 81 |
77.9%
|
| Sysmiss | 69 |