| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 275 |
67.6%
|
| 1 | Above 90% | 0 |
0%
|
| 2 | Between 50% and 90% | 18 |
4.4%
|
| 3 | Below 50% | 114 |
28%
|
| Sysmiss | 591 |