| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 3 |
4.5%
|
| -8 | Refusal (spontaneous) | 1 |
1.5%
|
| 1 | Yes | 1 |
1.5%
|
| 2 | No | 62 |
92.5%
|
| Sysmiss | 293 |