| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 4 |
5.3%
|
| 2 | Monthly | 26 |
34.7%
|
| 3 | Once a year | 45 |
60%
|
| 88 | Other | 0 |
0%
|
| Sysmiss | 15676 |