| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 8 |
1.4%
|
| -7 | Does not apply (spontaneous) | 42 |
7.1%
|
| 1 | Yes | 214 |
36.2%
|
| 2 | No | 327 |
55.3%
|
| Sysmiss | 10 |