| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 0 | Neither certificate or registered | 114 |
25.1%
|
| 1 | Has certificate | 236 |
51.9%
|
| 2 | Registered | 98 |
21.5%
|
| 8 | Don't know | 0 |
0%
|
| 9 | 7 |
1.5%
|
|
| Sysmiss | 13969 |