| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 5 |
1.4%
|
| -7 | Does not apply (spontaneous) | 34 |
9.5%
|
| 1 | Yes | 95 |
26.5%
|
| 2 | No | 224 |
62.6%
|
| Sysmiss | 1 |