| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 52 |
34%
|
| 1 | Above 90% | 2 |
1.3%
|
| 2 | Between 50% and 90% | 30 |
19.6%
|
| 3 | Below 50% | 69 |
45.1%
|
| Sysmiss | 204 |