| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| -7 | Does not apply (spontaneous) | 5 |
3.2%
|
| 1 | Yes | 10 |
6.4%
|
| 2 | No | 142 |
90.4%
|