| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 72 |
54.5%
|
| 1 | Above 90% | 0 |
0%
|
| 2 | Between 50% and 90% | 19 |
14.4%
|
| 3 | Below 50% | 41 |
31.1%
|
| Sysmiss | 219 |