| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 50 |
7.6%
|
| -7 | Does not apply (spontaneous) | 119 |
18%
|
| 1 | Yes | 114 |
17.2%
|
| 2 | No | 378 |
57.2%
|
| Sysmiss | 435 |