| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 1 |
0.4%
|
| -8 | Refusal (spontaneous) | 13 |
5.8%
|
| 1 | Yes | 50 |
22.1%
|
| 2 | No | 162 |
71.7%
|
| Sysmiss | 9150 |