| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 0 | Neither certificate or registered | 154 |
4.9%
|
| 1 | Has certificate | 2616 |
83.7%
|
| 2 | Registered | 329 |
10.5%
|
| 8 | Don't know | 27 |
0.9%
|
| 9 | 245 | ||
| Sysmiss | 21128 |