| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 20 |
15.2%
|
| 1 | Above 90% | 1 |
0.8%
|
| 2 | Between 50% and 90% | 32 |
24.2%
|
| 3 | Below 50% | 79 |
59.8%
|
| Sysmiss | 222 |