| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 5 |
3.8%
|
| -8 | Refusal (spontaneous) | 6 |
4.5%
|
| 1 | Yes | 22 |
16.7%
|
| 2 | No | 99 |
75%
|
| Sysmiss | 964 |