| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 3 |
0.8%
|
| -7 | Does not apply (spontaneous) | 11 |
2.9%
|
| 1 | Yes | 228 |
60.6%
|
| 2 | No | 134 |
35.6%
|
| Sysmiss | 1 |