| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 128 |
13.8%
|
| 2 | Monthly | 79 |
8.5%
|
| 3 | Yearly | 83 |
8.9%
|
| 4 | Not all | 638 |
68.8%
|
| Sysmiss | 71 |