| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 1 |
0.5%
|
| -7 | Does not apply (spontaneous) | 26 |
12.4%
|
| 1 | Yes | 49 |
23.4%
|
| 2 | No | 133 |
63.6%
|