| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 34 |
12.6%
|
| -7 | Does not apply (spontaneous) | 26 |
9.7%
|
| 1 | Yes | 137 |
50.9%
|
| 2 | No | 72 |
26.8%
|
| Sysmiss | 2 |