| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 0 | <12 months | 554 |
47%
|
| 1 | 1 year | 44 |
3.7%
|
| 2 | 2 years | 139 |
11.8%
|
| 3 | 3 years | 150 |
12.7%
|
| 4 | 4 years | 70 |
5.9%
|
| 5 | 5 years | 68 |
5.8%
|
| 6 | 6+ years | 26 |
2.2%
|
| 7 | non-numeric | 7 |
0.6%
|
| 8 | don't know | 120 |
10.2%
|
| Sysmiss | 790 |