| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 0 | <12 months | 2235 |
32.1%
|
| 1 | 1 year | 270 |
3.9%
|
| 2 | 2 years | 1075 |
15.4%
|
| 3 | 3 years | 1069 |
15.3%
|
| 4 | 4 years | 574 |
8.2%
|
| 5 | 5 years | 395 |
5.7%
|
| 6 | 6+ years | 191 |
2.7%
|
| 7 | non-numeric | 407 |
5.8%
|
| 8 | don't know | 750 |
10.8%
|
| Sysmiss | 4662 |