| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 2739 |
11.7%
|
| 2 | Monthly | 4228 |
18.1%
|
| 3 | Yearly | 2085 |
8.9%
|
| 4 | Not all | 14282 |
61.2%
|
| Sysmiss | 1073 |