| Value | Category | Cases | |
|---|---|---|---|
| -98 | Don't know | 13 |
0.3%
|
| 0 | No | 2840 |
65.3%
|
| 1 | Yes | 1499 |
34.4%
|
| 11 | .Z | 553 | |
| Sysmiss | 1 |