| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 8 |
1.1%
|
| 1 | Yes, fully | 91 |
12.8%
|
| 2 | Yes, partially | 13 |
1.8%
|
| 3 | No | 598 |
84.2%
|