| Value | Category | Cases | |
|---|---|---|---|
| 0 | <12 months | 166 |
14.9%
|
| 1 | 1 year | 79 |
7.1%
|
| 2 | 2 years | 131 |
11.8%
|
| 3 | 3 years | 114 |
10.3%
|
| 4 | 4 years | 100 |
9%
|
| 5 | 5 years | 60 |
5.4%
|
| 6 | 6+ years | 168 |
15.1%
|
| 7 | Non-numeric | 259 |
23.3%
|
| 8 | Don't know | 34 |
3.1%
|