| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 49 |
7.4%
|
| -7 | Does not apply (spontaneous) | 104 |
15.7%
|
| 1 | Yes | 189 |
28.6%
|
| 2 | No | 319 |
48.3%
|
| Sysmiss | 435 |