| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 44 |
37.9%
|
| 1 | Above 90% | 4 |
3.4%
|
| 2 | Between 50% and 90% | 39 |
33.6%
|
| 3 | Below 50% | 29 |
25%
|
| Sysmiss | 235 |