| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 2314 |
9.4%
|
| 2 | Monthly | 4264 |
17.3%
|
| 3 | Yearly | 3343 |
13.6%
|
| 4 | Not all | 14667 |
59.7%
|
| Sysmiss | 582 |