| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 0 | <12 months | 1055 |
30.2%
|
| 1 | 1 year | 319 |
9.1%
|
| 2 | 2 years | 646 |
18.5%
|
| 3 | 3 years | 710 |
20.3%
|
| 4 | 4 years | 325 |
9.3%
|
| 5 | 5 years | 201 |
5.7%
|
| 6 | 6+ years | 45 |
1.3%
|
| 7 | non-numeric | 37 |
1.1%
|
| 8 | don't know | 158 |
4.5%
|
| Sysmiss | 4224 |