| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 1 |
5%
|
| -8 | Refusal (spontaneous) | 2 |
10%
|
| 1 | Yes | 2 |
10%
|
| 2 | No | 15 |
75%
|
| Sysmiss | 332 |