| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 66 |
4.4%
|
| -7 | Does not apply (sponatneous) | 189 |
12.5%
|
| 1 | Yes | 320 |
21.2%
|
| 2 | No | 937 |
62%
|
| Sysmiss | 1443 |