| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 8452 |
35.6%
|
| 2 | Monthly | 4350 |
18.3%
|
| 3 | Yearly | 1739 |
7.3%
|
| 4 | Not all | 9213 |
38.8%
|
| Sysmiss | 1058 |