| Value | Category | Cases | |
|---|---|---|---|
| 0 | <12 months | 205 |
26.9%
|
| 1 | 1 year | 69 |
9.1%
|
| 2 | 2 years | 138 |
18.1%
|
| 3 | 3 years | 117 |
15.4%
|
| 4 | 4 years | 67 |
8.8%
|
| 5 | 5 years | 115 |
15.1%
|
| 6 | 6+ years | 31 |
4.1%
|
| 7 | Non-numeric | 3 |
0.4%
|
| 8 | Don't know | 16 |
2.1%
|