| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 1054 |
4.3%
|
| 2 | Monthly | 2517 |
10.2%
|
| 3 | Yearly | 2174 |
8.8%
|
| 4 | Not all | 18881 |
76.7%
|
| Sysmiss | 534 |