| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 0 | <12 months | 156 |
32.2%
|
| 1 | 1 year | 25 |
5.2%
|
| 2 | 2 years | 98 |
20.2%
|
| 3 | 3 years | 89 |
18.4%
|
| 4 | 4 years | 41 |
8.5%
|
| 5 | 5 years | 23 |
4.7%
|
| 6 | 6+ years | 15 |
3.1%
|
| 7 | Non-numeric | 21 |
4.3%
|
| 8 | Don't know | 17 |
3.5%
|