| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 25 |
10.7%
|
| -8 | Refusal (spontaneous) | 7 |
3%
|
| -7 | Does not apply (spontaneous) | 3 |
1.3%
|
| 1 | Yes | 9 |
3.9%
|
| 2 | No | 189 |
81.1%
|
| Sysmiss | 1136 |