| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 8 |
1.9%
|
| -7 | Does not apply (spontaneous) | 25 |
5.9%
|
| 1 | Yes | 97 |
22.8%
|
| 2 | No | 296 |
69.5%
|
| Sysmiss | 3 |