| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 17 |
2.2%
|
| -7 | Does not apply (spontaneous) | 127 |
16.5%
|
| 1 | Yes | 118 |
15.3%
|
| 2 | No | 510 |
66.1%
|