| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 0 | neither certificate or registered | 277 |
12%
|
| 1 | has certificate | 1822 |
79.1%
|
| 2 | registered | 182 |
7.9%
|
| 8 | don't know | 22 |
1%
|
| Sysmiss | 10948 |