| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know | 10 |
11.1%
|
| -8 | Refuse | 1 |
1.1%
|
| 1 | Yes | 21 |
23.3%
|
| 2 | No | 58 |
64.4%
|
| Sysmiss | 392 |