| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 1 |
0.1%
|
| 1 | Yes, fully | 544 |
44.7%
|
| 2 | Yes, partially | 406 |
33.4%
|
| 3 | No | 265 |
21.8%
|