| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 41 |
3.1%
|
| -7 | Does not apply (spontaneous) | 13 |
1%
|
| 1 | Yes | 495 |
37.4%
|
| 2 | No | 774 |
58.5%
|