| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 79 |
5.2%
|
| -7 | Does not apply (sponatneous) | 145 |
9.6%
|
| 1 | Yes | 426 |
28.2%
|
| 2 | No | 862 |
57%
|
| Sysmiss | 1443 |