| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 1 |
0.5%
|
| -8 | Refusal (spontaneous) | 3 |
1.4%
|
| 1 | Yes | 59 |
27.2%
|
| 2 | No | 154 |
71%
|
| Sysmiss | 781 |