| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 16 |
4.7%
|
| -7 | Does not apply (spontaneous) | 21 |
6.1%
|
| 1 | Yes | 106 |
31%
|
| 2 | No | 199 |
58.2%
|
| Sysmiss | 10 |