| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 2 |
0.6%
|
| 1 | Yes, fully | 41 |
11.4%
|
| 2 | Yes, partially | 39 |
10.8%
|
| 3 | No | 278 |
77.2%
|