| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 34 |
0.3%
|
| -8 | Refusal (spontaneous) | 82 |
0.8%
|
| 1 | Yes | 1723 |
16.1%
|
| 2 | No | 8833 |
82.8%
|