| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 23 |
3%
|
| -7 | Does not apply (spontaneous) | 49 |
6.3%
|
| 1 | Yes | 228 |
29.5%
|
| 2 | No | 472 |
61.1%
|