| Value | Category | Cases | |
|---|---|---|---|
| 0 | <12 months | 194 |
23.6%
|
| 1 | 1 year | 99 |
12%
|
| 2 | 2 years | 203 |
24.7%
|
| 3 | 3 years | 138 |
16.8%
|
| 4 | 4 years | 61 |
7.4%
|
| 5 | 5 years | 89 |
10.8%
|
| 6 | 6+ years | 19 |
2.3%
|
| 7 | Non-numeric | 10 |
1.2%
|
| 8 | Don't know | 9 |
1.1%
|