| Value | Category | Cases | |
|---|---|---|---|
| 0 | neither certificate or registered | 215 |
13.1%
|
| 1 | has certificate | 280 |
17%
|
| 2 | registered | 1147 |
69.6%
|
| 8 | don't know | 5 |
0.3%
|
| Sysmiss | 11302 |