| Value | Category | Cases | |
|---|---|---|---|
| 1 | Monthly | 174 |
31.9%
|
| 2 | Quarterly | 183 |
33.5%
|
| 3 | Bi-quarterly | 1 |
0.2%
|
| 4 | Half yearly | 13 |
2.4%
|
| 5 | Yearly | 13 |
2.4%
|
| 6 | Never | 162 |
29.7%
|
| Sysmiss | 1 |