| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 4 |
1.1%
|
| -7 | Does not apply (spontaneous) | 52 |
13.8%
|
| 1 | Yes | 85 |
22.6%
|
| 2 | No | 235 |
62.5%
|
| Sysmiss | 1 |