| Value | Category | Cases | |
|---|---|---|---|
| 1 | month | 61 |
27.1%
|
| 2 | 3 months | 20 |
8.9%
|
| 3 | 6 months | 20 |
8.9%
|
| 4 | year | 124 |
55.1%
|
| Sysmiss | 48961 |