| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 3 |
0.8%
|
| -7 | Does not apply (spontaneous) | 8 |
2.2%
|
| 1 | Yes | 140 |
38.8%
|
| 2 | No | 210 |
58.2%
|