| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 5 |
2.5%
|
| -8 | Refusal (spontaneous) | 1 |
0.5%
|
| 1 | Yes | 34 |
16.9%
|
| 2 | No | 161 |
80.1%
|
| Sysmiss | 9175 |