| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 0 | Neither certificate or registered | 23 |
30.3%
|
| 1 | Has certificate | 35 |
46.1%
|
| 2 | Registered | 17 |
22.4%
|
| 8 | Don't know | 0 |
0%
|
| 9 | 1 |
1.3%
|
|
| Sysmiss | 14348 |