| Value | Category | Cases | |
|---|---|---|---|
| 1 | days | 211 |
27.9%
|
| 2 | months | 294 |
38.8%
|
| 3 | years | 249 |
32.9%
|
| 9 | special answers | 3 |
0.4%
|
| Sysmiss | 15228 |