| Value | Category | Cases | |
|---|---|---|---|
| 1 | Days | 18 |
26.9%
|
| 2 | Months | 29 |
43.3%
|
| 3 | Years | 20 |
29.9%
|
| 9 | Special answers | 0 |
0%
|
| Sysmiss | 10303 |