| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 2 |
0.6%
|
| -7 | Does not apply (spontaneous) | 41 |
11.4%
|
| 1 | Yes | 60 |
16.7%
|
| 2 | No | 257 |
71.4%
|