| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 316 |
10.7%
|
| -6 | Still in process | 7 |
0.2%
|
| 1 | Yes | 330 |
11.2%
|
| 2 | No | 2302 |
77.9%
|