| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 1 |
1.3%
|
| -8 | Refusal (spontaneous) | 1 |
1.3%
|
| 1 | Yes | 14 |
18.7%
|
| 2 | No | 59 |
78.7%
|
| Sysmiss | 540 |