| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 29 |
1.9%
|
| -8 | Refusal (spontaneous) | 7 |
0.5%
|
| 1 | Yes | 88 |
5.8%
|
| 2 | No | 1393 |
91.8%
|
| Sysmiss | 1118 |