| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1. Limited duration | 2048 |
15.5%
|
| 2 | 2. Permanent nature | 7776 |
58.9%
|
| 3 | 3. Unspecified duration | 3367 |
25.5%
|
| Sysmiss | 52136 |