| Value | Category | Cases | |
|---|---|---|---|
| 1 | month | 315 |
22.9%
|
| 2 | 3 months | 98 |
7.1%
|
| 3 | 6 months | 98 |
7.1%
|
| 4 | year | 866 |
62.9%
|
| Sysmiss | 47809 |