| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 39 |
10.6%
|
| 1 | Above 90% | 11 |
3%
|
| 2 | Between 50% and 90% | 126 |
34.1%
|
| 3 | Below 50% | 193 |
52.3%
|
| Sysmiss | 618 |