| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 29 |
4.9%
|
| -8 | Refusal (spontaneous) | 1 |
0.2%
|
| 1 | Yes | 161 |
27.2%
|
| 2 | No | 400 |
67.7%
|
| Sysmiss | 10 |