| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 2843 |
11.4%
|
| 2 | Monthly | 4440 |
17.7%
|
| 3 | Yearly | 2364 |
9.4%
|
| 4 | Not all | 15398 |
61.5%
|
| Sysmiss | 69 |