| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 0 | < 1 year complete | 19 |
2.7%
|
| 1 | 90 |
12.6%
|
|
| 2 | 109 |
15.3%
|
|
| 3 | 147 |
20.6%
|
|
| 4 | 127 |
17.8%
|
|
| 5 | 61 |
8.5%
|
|
| 6 | 158 |
22.1%
|
|
| 8 | don't know | 3 |
0.4%
|
| Sysmiss | 4098 |