| Value | Category | Cases | |
|---|---|---|---|
| 1 | Days | 8 |
4.8%
|
| 2 | Weeks | 6 |
3.6%
|
| 3 | Months | 116 |
69%
|
| 4 | Years | 38 |
22.6%
|
| Sysmiss | 767 |