| Value | Category | Cases | |
|---|---|---|---|
| 1 | days | 156 |
28.9%
|
| 2 | months | 216 |
40%
|
| 3 | years | 166 |
30.7%
|
| 9 | special answers | 2 |
0.4%
|
| Sysmiss | 14811 |