| Value | Category | Cases | |
|---|---|---|---|
| 0 | <12 months | 525 |
16.6%
|
| 1 | 1 year | 228 |
7.2%
|
| 2 | 2 years | 637 |
20.1%
|
| 3 | 3 years | 559 |
17.6%
|
| 4 | 4 years | 288 |
9.1%
|
| 5 | 5 years | 526 |
16.6%
|
| 6 | 6+ years | 195 |
6.1%
|
| 7 | Non-numeric | 145 |
4.6%
|
| 8 | Don't know | 69 |
2.2%
|