| Value | Category | Cases | |
|---|---|---|---|
| 1 | Monthly | 936 |
87.5%
|
| 2 | Quarterly | 75 |
7%
|
| 3 | Yearly | 11 |
1%
|
| 4 | Occasionally | 48 |
4.5%
|
| Sysmiss | 3474 |