| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 1512 |
28.3%
|
| -8 | Refusal (spontaneous) | 85 |
1.6%
|
| 1 | Yes | 2014 |
37.6%
|
| 2 | No | 1741 |
32.5%
|