| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 0 | < 1 year complete | 1 |
20%
|
| 1 | 2 |
40%
|
|
| 2 | 1 |
20%
|
|
| 6 | 1 |
20%
|
|
| 8 | don't know | 0 |
0%
|
| Sysmiss | 4807 |