| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 1021 |
19.3%
|
| -7 | Does not apply (spontaneous) | 351 |
6.6%
|
| 1 | Yes | 1468 |
27.8%
|
| 2 | No | 2444 |
46.3%
|
| Sysmiss | 5388 |