| Value | Category | Cases | |
|---|---|---|---|
| 0 | <12 months | 702 |
7.7%
|
| 1 | 1 year | 470 |
5.2%
|
| 2 | 2 years | 685 |
7.5%
|
| 3 | 3 years | 827 |
9.1%
|
| 4 | 4 years | 514 |
5.7%
|
| 5 | 5 years | 1400 |
15.4%
|
| 6 | 6+ years | 1921 |
21.2%
|
| 7 | non-numeric | 2517 |
27.7%
|
| 8 | don't know | 40 |
0.4%
|
| Sysmiss | 5558 |