| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 57 |
8.6%
|
| -7 | Does not apply (spontaneous) | 123 |
18.6%
|
| 1 | Yes | 85 |
12.9%
|
| 2 | No | 396 |
59.9%
|
| Sysmiss | 435 |