| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 2839 |
11.8%
|
| 2 | Monthly | 8472 |
35.2%
|
| 3 | Yearly | 5739 |
23.8%
|
| 4 | Not all | 7047 |
29.2%
|
| Sysmiss | 392 |