| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 20 |
10.2%
|
| -8 | Refusal (spontaneous) | 17 |
8.6%
|
| 1 | Yes | 83 |
42.1%
|
| 2 | No | 77 |
39.1%
|
| Sysmiss | 1140 |