| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 6 |
2.6%
|
| -8 | Refusal (spontaneous) | 1 |
0.4%
|
| 1 | Yes | 47 |
20.4%
|
| 2 | No | 176 |
76.5%
|
| Sysmiss | 768 |