| Value | Category | Cases | |
|---|---|---|---|
| 1 | Days | 870 |
41.6%
|
| 2 | Months | 781 |
37.3%
|
| 3 | Years | 410 |
19.6%
|
| 9 | Missing | 32 |
1.5%
|
| Sysmiss | 53730 |