| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 5 |
8.6%
|
| -8 | Refusal (spontaneous) | 3 |
5.2%
|
| 1 | Yes | 6 |
10.3%
|
| 2 | No | 44 |
75.9%
|
| Sysmiss | 320 |