| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 45 |
3.4%
|
| -7 | Does not apply (spontaneous) | 24 |
1.8%
|
| 1 | Yes | 329 |
24.9%
|
| 2 | No | 925 |
69.9%
|