| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 51 |
7.7%
|
| -7 | Does not apply (spontaneous) | 94 |
14.2%
|
| 1 | Yes | 203 |
30.7%
|
| 2 | No | 313 |
47.4%
|
| Sysmiss | 435 |