| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 0 | neither certificate or registered | 14001 |
34.8%
|
| 1 | has certificate | 21954 |
54.5%
|
| 2 | registered | 3873 |
9.6%
|
| 8 | don't know | 426 |
1.1%
|
| Sysmiss | 33542 |