| Value | Category | Cases | |
|---|---|---|---|
| -99 | 2646 |
54.5%
|
|
| 1 | month | 1904 |
39.2%
|
| 2 | 15 days | 80 |
1.6%
|
| 3 | weekly | 14 |
0.3%
|
| 4 | daily | 208 |
4.3%
|
| Sysmiss | 3258 |