| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 57 |
9.5%
|
| 1 | Less than 50% | 234 |
38.9%
|
| 2 | Between 50% and 90% | 258 |
42.9%
|
| 3 | >90% | 52 |
8.7%
|