| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 0 | Neither certificate or registered | 96 |
26.2%
|
| 1 | Has certificate | 178 |
48.5%
|
| 2 | Registered | 84 |
22.9%
|
| 8 | Don't know | 1 |
0.3%
|
| 9 | 8 |
2.2%
|
|
| Sysmiss | 14057 |