| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 56 |
15.5%
|
| -8 | Refusal (spontaneous) | 1 |
0.3%
|
| 1 | Yes | 12 |
3.3%
|
| 2 | No | 292 |
80.9%
|