| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 263 |
7%
|
| -8 | Refusal (spontaneous) | 34 |
0.9%
|
| 1 | Yes | 194 |
5.1%
|
| 2 | No | 3284 |
87%
|