| Value | Category | Cases | |
|---|---|---|---|
| 1 | days | 211 |
28.1%
|
| 2 | months | 293 |
39.1%
|
| 3 | years | 243 |
32.4%
|
| 9 | special answers | 3 |
0.4%
|
| Sysmiss | 14601 |