| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 15 |
7.9%
|
| -8 | Refusal (spontaneous) | 8 |
4.2%
|
| -7 | Does not apply (spontaneous) | 3 |
1.6%
|
| 1 | Yes | 27 |
14.1%
|
| 2 | No | 138 |
72.3%
|
| Sysmiss | 905 |