| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 8 |
9.6%
|
| -8 | Refusal (spontaneous) | 3 |
3.6%
|
| 1 | Yes | 10 |
12%
|
| 2 | No | 62 |
74.7%
|
| Sysmiss | 269 |