| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 1 |
1.9%
|
| -8 | Refusal (spontaneous) | 3 |
5.7%
|
| 1 | Yes | 9 |
17%
|
| 2 | No | 40 |
75.5%
|
| Sysmiss | 719 |