| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know | 1 |
0.1%
|
| -8 | Refused | 1 |
0.1%
|
| 1 | Yes | 28 |
3.9%
|
| 2 | No | 696 |
95.9%
|
| Sysmiss | 360 |