| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 0 | <12 months | 224 |
13%
|
| 1 | 1 year | 286 |
16.5%
|
| 2 | 2 years | 370 |
21.4%
|
| 3 | 3 years | 317 |
18.3%
|
| 4 | 4 years | 128 |
7.4%
|
| 5 | 5 years | 91 |
5.3%
|
| 6 | 6+ years | 85 |
4.9%
|
| 7 | non-numeric | 183 |
10.6%
|
| 8 | don't know | 45 |
2.6%
|
| Sysmiss | 912 |