| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 0 | Neither certificate or registered | 47 |
27.2%
|
| 1 | Has certificate | 88 |
50.9%
|
| 2 | Registered | 37 |
21.4%
|
| 8 | Don't know | 0 |
0%
|
| 9 | 1 |
0.6%
|
|
| Sysmiss | 14251 |