| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 36 |
13.4%
|
| -7 | Does not apply (spontaneous) | 26 |
9.7%
|
| 1 | Yes | 73 |
27.1%
|
| 2 | No | 134 |
49.8%
|
| Sysmiss | 2 |