| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 33 |
39.8%
|
| 1 | Above 90% | 0 |
0%
|
| 2 | Between 50% and 90% | 10 |
12%
|
| 3 | Below 50% | 40 |
48.2%
|
| Sysmiss | 70 |