| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 8 |
10.4%
|
| 1 | Above 90% | 2 |
2.6%
|
| 2 | Between 50% and 90% | 51 |
66.2%
|
| 3 | Below 50% | 16 |
20.8%
|
| Sysmiss | 73 |