| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| -8 | Refusal (spontaneous) | 2 |
5%
|
| 1 | Yes | 6 |
15%
|
| 2 | No | 32 |
80%
|
| Sysmiss | 609 |