| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 8 |
2.4%
|
| -8 | Refusal (spontaneous) | 3 |
0.9%
|
| 1 | Yes | 4 |
1.2%
|
| 2 | No | 317 |
95.5%
|
| Sysmiss | 1037 |