| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 2 |
6.1%
|
| -8 | Refusal (spontaneous) | 1 |
3%
|
| 1 | Yes | 4 |
12.1%
|
| 2 | No | 26 |
78.8%
|
| Sysmiss | 319 |