| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 0 | < 1 year complete | 7 |
9.5%
|
| 1 | 18 |
24.3%
|
|
| 2 | 12 |
16.2%
|
|
| 3 | 8 |
10.8%
|
|
| 4 | 11 |
14.9%
|
|
| 5 | 10 |
13.5%
|
|
| 6 | 7 |
9.5%
|
|
| 8 | don't know | 1 |
1.4%
|
| Sysmiss | 4738 |