| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 82 |
17.4%
|
| 1 | Above 90% | 18 |
3.8%
|
| 2 | Between 50% and 90% | 113 |
24%
|
| 3 | Below 50% | 258 |
54.8%
|
| Sysmiss | 531 |