| Value | Category | Cases | |
|---|---|---|---|
| 0 | 1 |
0%
|
|
| 1 | Limited duration | 1934 |
32%
|
| 2 | Permanent duration | 3268 |
54.2%
|
| 3 | Unspecified duration | 832 |
13.8%
|
| Sysmiss | 18685 |