| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 0 | <12 months | 2985 |
30.7%
|
| 1 | 1 year | 547 |
5.6%
|
| 2 | 2 years | 1267 |
13%
|
| 3 | 3 years | 1884 |
19.4%
|
| 4 | 4 years | 1140 |
11.7%
|
| 5 | 5 years | 813 |
8.4%
|
| 6 | 6+ years | 164 |
1.7%
|
| 7 | non-numeric | 340 |
3.5%
|
| 8 | don't know | 578 |
5.9%
|
| Sysmiss | 2625 |