| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 2761 |
11.5%
|
| 2 | Monthly | 4203 |
17.4%
|
| 3 | Yearly | 2304 |
9.6%
|
| 4 | Not all | 14829 |
61.5%
|
| Sysmiss | 392 |