| Value | Category | Cases | |
|---|---|---|---|
| -98 | Don't know | 31 |
0.9%
|
| 0 | No | 3022 |
90.5%
|
| 1 | Yes | 288 |
8.6%
|
| 11 | .Z | 1564 | |
| Sysmiss | 1 |