| Value | Category | Cases | |
|---|---|---|---|
| 1 | Days | 554 |
52.8%
|
| 2 | Months | 258 |
24.6%
|
| 3 | Years | 231 |
22%
|
| 9 | Special answers | 7 |
0.7%
|
| Sysmiss | 30417 |