| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 2 |
0.6%
|
| -7 | Does not apply (spontaneous) | 38 |
10.6%
|
| 1 | Yes | 119 |
33.1%
|
| 2 | No | 201 |
55.8%
|