| Value | Category | Cases | Weighted | |
|---|---|---|---|---|
| 1 | Less than 6 month | 270 | 277 |
4.1%
|
| 2 | From 6 – less than one year | 286 | 291 |
4.3%
|
| 3 | One year and more | 659 | 646 |
9.5%
|
| 4 | Not Specified | 1736 | 1698 |
25.1%
|
| Sysmiss | 3828 | 3866 |