| Value | Category | Cases | |
|---|---|---|---|
| 0 | None | 1102 |
13.5%
|
| 1 | Day | 567 |
7%
|
| 2 | Week | 1168 |
14.4%
|
| 3 | Month | 847 |
10.4%
|
| 4 | Year | 4454 |
54.7%
|
| Sysmiss | 13374 |