| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 106 |
8.1%
|
| -7 | Does not apply (spontaneous) | 53 |
4%
|
| 1 | Yes | 347 |
26.5%
|
| 2 | No | 805 |
61.4%
|
| Sysmiss | 58 |