| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 1002 |
18.6%
|
| -7 | Does not apply (spontaneous) | 379 |
7%
|
| 1 | Yes | 1271 |
23.6%
|
| 2 | No | 2736 |
50.8%
|
| Sysmiss | 5284 |