| Value | Category | Cases | |
|---|---|---|---|
| 0 | <12 months | 559 |
20.7%
|
| 1 | 1 year | 220 |
8.1%
|
| 2 | 2 years | 403 |
14.9%
|
| 3 | 3 years | 440 |
16.3%
|
| 4 | 4 years | 234 |
8.7%
|
| 5 | 5 years | 409 |
15.1%
|
| 6 | 6+ years | 178 |
6.6%
|
| 7 | Non-numeric | 208 |
7.7%
|
| 8 | Don't know | 53 |
2%
|