| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 40 |
10%
|
| -8 | Refusal (spontaneous) | 2 |
0.5%
|
| 1 | Yes | 293 |
73.1%
|
| 2 | No | 66 |
16.5%
|
| Sysmiss | 968 |