| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 4 |
1.1%
|
| -7 | Does not apply (spontaneous) | 17 |
4.7%
|
| 1 | Yes | 97 |
26.7%
|
| 2 | No | 245 |
67.5%
|
| Sysmiss | 2 |