| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 1648 |
15.4%
|
| -8 | Refusal (spontaneous) | 553 |
5.2%
|
| 1 | Yes | 1992 |
18.7%
|
| 2 | No | 6479 |
60.7%
|