| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 38 |
14.1%
|
| -7 | Does not apply (spontaneous) | 31 |
11.5%
|
| 1 | Yes | 90 |
33.5%
|
| 2 | No | 110 |
40.9%
|
| Sysmiss | 2 |