| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 98 |
7.5%
|
| -7 | Does not apply (spontaneous) | 59 |
4.5%
|
| 1 | Yes | 502 |
38.3%
|
| 2 | No | 652 |
49.7%
|
| Sysmiss | 58 |