| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 5 |
1.4%
|
| -8 | Refusal (spontaneous) | 17 |
4.7%
|
| 1 | Yes | 19 |
5.2%
|
| 2 | No | 322 |
88.7%
|
| Sysmiss | 1083 |