| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 1 |
1.1%
|
| -8 | Refusal (spontaneous) | 2 |
2.1%
|
| 1 | Yes | 12 |
12.6%
|
| 2 | No | 80 |
84.2%
|
| Sysmiss | 506 |