| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 57 |
8.6%
|
| -7 | Does not apply (spontaneous) | 106 |
16%
|
| 1 | Yes | 136 |
20.6%
|
| 2 | No | 362 |
54.8%
|
| Sysmiss | 435 |