| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 11 |
1.4%
|
| -7 | Does not apply (spontaneous) | 37 |
4.8%
|
| 1 | Yes | 249 |
32.3%
|
| 2 | No | 475 |
61.5%
|