| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 1 |
0.3%
|
| -7 | Does not apply (spontaneous) | 16 |
4.4%
|
| 1 | Yes | 135 |
37.5%
|
| 2 | No | 208 |
57.8%
|