| Value | Category | Cases | |
|---|---|---|---|
| 0 | <12 months | 328 |
14.9%
|
| 1 | 1 year | 171 |
7.8%
|
| 2 | 2 years | 356 |
16.2%
|
| 3 | 3 years | 496 |
22.5%
|
| 4 | 4 years | 214 |
9.7%
|
| 5 | 5 years | 351 |
16%
|
| 6 | 6+ years | 123 |
5.6%
|
| 7 | non-numeric | 10 |
0.5%
|
| 8 | don't know | 150 |
6.8%
|
| 9 | 1 |
0%
|
|
| 11 | .Z | 6039 |