| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 28 |
4.7%
|
| 1 | Yes, fully | 109 |
18.2%
|
| 2 | Yes, partially | 146 |
24.4%
|
| 3 | No | 315 |
52.7%
|