| Value | Category | Cases | |
|---|---|---|---|
| 0 | Not filled | 624 |
8.3%
|
| 1 | Limited duration | 841 |
11.1%
|
| 2 | Permanent | 3863 |
51.1%
|
| 3 | Unspecified duration | 2229 |
29.5%
|
| Sysmiss | 26974 |