| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 987 |
4.2%
|
| 2 | Monthly | 945 |
4%
|
| 3 | Yearly | 1421 |
6%
|
| 4 | Not all | 20401 |
85.9%
|
| Sysmiss | 1058 |