| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 0 | < 1 year complete | 30 |
18.3%
|
| 1 | 32 |
19.5%
|
|
| 2 | 25 |
15.2%
|
|
| 3 | 24 |
14.6%
|
|
| 4 | 10 |
6.1%
|
|
| 5 | 14 |
8.5%
|
|
| 6 | 27 |
16.5%
|
|
| 8 | don't know | 2 |
1.2%
|
| Sysmiss | 4648 |