| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 1 |
0.4%
|
| 1 | Above 90% | 8 |
3.1%
|
| 2 | Between 50% and 90% | 51 |
19.9%
|
| 3 | Below 50% | 196 |
76.6%
|
| Sysmiss | 1176 |