| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 28 |
31.8%
|
| -7 | Does not apply (spontaneous) | 44 |
50%
|
| 0 | 5 |
5.7%
|
|
| 100 | 11 |
12.5%
|
|
| Sysmiss | 264 |