| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 5 |
1.3%
|
| -7 | Does not apply (spontaneous) | 33 |
8.8%
|
| 1 | Yes | 118 |
31.4%
|
| 2 | No | 220 |
58.5%
|
| Sysmiss | 1 |