| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 15 |
12%
|
| 1 | Above 90% | 3 |
2.4%
|
| 2 | Between 50% and 90% | 43 |
34.4%
|
| 3 | Below 50% | 64 |
51.2%
|
| Sysmiss | 180 |