| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 3 |
0.8%
|
| -7 | Does not apply (spontaneous) | 7 |
1.9%
|
| 1 | Yes | 149 |
41.3%
|
| 2 | No | 202 |
56%
|