| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 48 |
39.7%
|
| 1 | Above 90% | 4 |
3.3%
|
| 2 | Between 50% and 90% | 40 |
33.1%
|
| 3 | Below 50% | 29 |
24%
|
| Sysmiss | 239 |