| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know | 2 |
5.7%
|
| -8 | Refuse | 2 |
5.7%
|
| 1 | Yes | 8 |
22.9%
|
| 2 | No | 23 |
65.7%
|
| Sysmiss | 447 |