| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 33 |
2.3%
|
| -7 | Does not apply (spontaneous) | 52 |
3.7%
|
| 1 | Yes | 622 |
44%
|
| 2 | No | 706 |
50%
|
| Sysmiss | 33 |