| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| -7 | Does not apply (spontaneous) | 7 |
25%
|
| 1 | Yes | 4 |
14.3%
|
| 2 | No | 17 |
60.7%
|
| Sysmiss | 83 |