| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 74 |
52.9%
|
| 1 | Above 90% | 1 |
0.7%
|
| 2 | Between 50% and 90% | 21 |
15%
|
| 3 | Below 50% | 44 |
31.4%
|
| Sysmiss | 220 |