| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 0 | Neither certificate or registered | 25 |
26%
|
| 1 | Has certificate | 42 |
43.8%
|
| 2 | Registered | 28 |
29.2%
|
| 8 | Don't know | 1 |
1%
|
| Sysmiss | 14328 |