| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 275 |
1.2%
|
| 2 | Monthly | 605 |
2.6%
|
| 3 | Yearly | 4537 |
19.4%
|
| 4 | Not all | 17917 |
76.8%
|
| Sysmiss | 1073 |