| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 16 |
2.1%
|
| -7 | Does not apply (spontaneous) | 62 |
8%
|
| 1 | Yes | 303 |
39.2%
|
| 2 | No | 391 |
50.6%
|