| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 0 | <12 months | 375 |
21.4%
|
| 1 | 1 year | 122 |
6.9%
|
| 2 | 2 years | 316 |
18%
|
| 3 | 3 years | 108 |
6.2%
|
| 4 | 4 years | 58 |
3.3%
|
| 5 | 5 years | 43 |
2.4%
|
| 6 | 6+ years | 89 |
5.1%
|
| 7 | Non-numeric | 568 |
32.3%
|
| 8 | Don't know | 77 |
4.4%
|