| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 3 |
1.2%
|
| -8 | Refusal (spontaneous) | 4 |
1.6%
|
| 1 | Yes | 14 |
5.7%
|
| 2 | No | 226 |
91.5%
|
| Sysmiss | 113 |