| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 2663 |
11.1%
|
| 2 | Monthly | 2842 |
11.8%
|
| 3 | Yearly | 1550 |
6.4%
|
| 4 | Not all | 17042 |
70.7%
|
| Sysmiss | 392 |