| Value | Category | Cases | |
|---|---|---|---|
| 0 | <12 months | 247 |
14.3%
|
| 1 | 1 year | 186 |
10.8%
|
| 2 | 2 years | 306 |
17.7%
|
| 3 | 3 years | 222 |
12.9%
|
| 4 | 4 years | 139 |
8.1%
|
| 5 | 5 years | 178 |
10.3%
|
| 6 | 6+ years | 192 |
11.1%
|
| 7 | Non-numeric | 222 |
12.9%
|
| 8 | Don't know | 33 |
1.9%
|