| Value | Category | Cases | |
|---|---|---|---|
| 0 | no | 3449 |
70.1%
|
| 1 | yes | 1448 |
29.4%
|
| 8 | don't know | 21 |
0.4%
|
| 11 | .A | 2 | |
| Sysmiss | 30690 |