| Value | Category | Cases | Weighted | |
|---|---|---|---|---|
| 1 | every month | 9 | 9 |
3.2%
|
| 2 | every two month | 2 | 1 |
0.4%
|
| 3 | every three month | 318 | 277 |
96.4%
|
| Sysmiss | 2964 | 3005 |