| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 72 |
5.4%
|
| -8 | Refusal (spontaneous) | 5 |
0.4%
|
| 1 | Yes | 370 |
28%
|
| 2 | No | 876 |
66.2%
|