| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 32 |
11.9%
|
| -7 | Does not apply (spontaneous) | 18 |
6.7%
|
| 1 | Yes | 162 |
60.2%
|
| 2 | No | 57 |
21.2%
|
| Sysmiss | 2 |