| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 101 |
7.7%
|
| -7 | Does not apply (spontaneous) | 53 |
4%
|
| 1 | Yes | 422 |
32.2%
|
| 2 | No | 735 |
56.1%
|
| Sysmiss | 58 |