| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 2662 |
11.2%
|
| 2 | Monthly | 2608 |
11%
|
| 3 | Yearly | 2313 |
9.7%
|
| 4 | Not all | 16171 |
68.1%
|
| Sysmiss | 1058 |