| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 1 |
0.3%
|
| -7 | Does not apply (spontaneous) | 7 |
1.9%
|
| 1 | Yes | 123 |
34.2%
|
| 2 | No | 229 |
63.6%
|