| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 17 |
5.6%
|
| -8 | Refusal (spontaneous) | 10 |
3.3%
|
| 1 | Yes | 47 |
15.5%
|
| 2 | No | 229 |
75.6%
|
| Sysmiss | 18354 |