| Value | Category | Cases | |
|---|---|---|---|
| 1 | Has Certificate | 1643 |
25.6%
|
| 2 | Registered | 2329 |
36.4%
|
| 3 | Neither | 2181 |
34%
|
| 8 | DK | 254 |
4%
|
| Sysmiss | 34036 |