| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know | 1 |
2.9%
|
| -8 | Refuse | 3 |
8.6%
|
| 1 | Yes | 3 |
8.6%
|
| 2 | No | 28 |
80%
|
| Sysmiss | 447 |