| Value | Category | Cases | Weighted | |
|---|---|---|---|---|
| 1 | less than one year | 469 | 480 |
7.1%
|
| 2 | 1-3 years | 656 | 685 |
10.1%
|
| 3 | more than 3 years | 580 | 613 |
9%
|
| 4 | Do not Know | 11 | 11 |
0.2%
|
| Sysmiss | 5063 | 4990 |