| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 97 |
7.4%
|
| -7 | Does not apply (spontaneous) | 60 |
4.6%
|
| 1 | Yes | 330 |
25.2%
|
| 2 | No | 824 |
62.9%
|
| Sysmiss | 58 |