| Value | Category | Cases | |
|---|---|---|---|
| 1 | Month | 1530 |
97.4%
|
| 2 | Quarterly | 11 |
0.7%
|
| 3 | Six months | 10 |
0.6%
|
| 4 | Annually | 20 |
1.3%
|
| Sysmiss | 11710 |