| Value | Category | Cases | |
|---|---|---|---|
| 1 | Monthly | 2669 |
13.1%
|
| 2 | Quarterly | 3468 |
17.1%
|
| 3 | Half-yearly | 2588 |
12.7%
|
| 4 | Annually | 4586 |
22.6%
|
| 5 | Never | 6828 |
33.6%
|
| 6 | Don't Know | 196 |
1%
|
| Sysmiss | 3147 |