| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 5 |
6.7%
|
| -8 | Refusal (spontaneous) | 2 |
2.7%
|
| 1 | Yes | 8 |
10.7%
|
| 2 | No | 60 |
80%
|
| Sysmiss | 1247 |