| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 3 |
2%
|
| -7 | Doesn't apply (spontaneous) | 6 |
4%
|
| 1 | Yes | 97 |
64.2%
|
| 2 | No | 45 |
29.8%
|