| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 1000 |
18.9%
|
| -7 | Does not apply (spontaneous) | 339 |
6.4%
|
| 1 | Yes | 1213 |
23%
|
| 2 | No | 2732 |
51.7%
|
| Sysmiss | 5388 |