| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 4 |
4.9%
|
| -8 | Refusal (spontaneous) | 0 |
0%
|
| 1 | Yes | 18 |
22.2%
|
| 2 | No | 59 |
72.8%
|
| Sysmiss | 632 |