| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 1 |
0.8%
|
| -8 | Refusal (spontaneous) | 7 |
5.4%
|
| 1 | Yes | 30 |
23.1%
|
| 2 | No | 92 |
70.8%
|
| Sysmiss | 889 |