| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 3 |
0.8%
|
| -7 | Does not apply (spontaneous) | 6 |
1.7%
|
| 1 | Yes | 202 |
56%
|
| 2 | No | 150 |
41.6%
|