| Value | Category | Cases | |
|---|---|---|---|
| 0 | neither certificate or registered | 308 |
40.5%
|
| 1 | has certificate | 346 |
45.5%
|
| 2 | registered | 82 |
10.8%
|
| 8 | don't know | 15 |
2%
|
| 9 | 9 |
1.2%
|
|
| 11 | .Z | 14907 |