| Value | Category | Cases | |
|---|---|---|---|
| -98 | Don't know | 15 |
0.4%
|
| 0 | No | 2447 |
73.2%
|
| 1 | Yes | 879 |
26.3%
|
| 11 | .Z | 1564 | |
| Sysmiss | 1 |