| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know | 3 |
0.4%
|
| -8 | Refused | 1 |
0.1%
|
| 1 | Yes | 171 |
22.6%
|
| 2 | No | 581 |
76.9%
|
| Sysmiss | 1239 |