| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 377 |
12.1%
|
| -8 | Refusal (spontaneous) | 253 |
8.1%
|
| 1 | Yes | 92 |
3%
|
| 2 | No | 2383 |
76.7%
|