| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 34 |
3.4%
|
| 1 | Yes, fully | 214 |
21.2%
|
| 2 | Yes, partially | 164 |
16.3%
|
| 3 | No | 596 |
59.1%
|