| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 68 |
4.5%
|
| -7 | Does not apply (sponatneous) | 183 |
12.1%
|
| 1 | Yes | 424 |
28%
|
| 2 | No | 837 |
55.4%
|
| Sysmiss | 1443 |