| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 139 |
13.5%
|
| -7 | Does not apply (spontaneous) | 13 |
1.3%
|
| 1 | Yes | 630 |
61%
|
| 2 | No | 250 |
24.2%
|
| Sysmiss | 608 |