| Value | Category | Cases | |
|---|---|---|---|
| 1 | Monthly | 1181 |
6.6%
|
| 2 | Quarterly | 1463 |
8.1%
|
| 3 | Half-yearly | 1294 |
7.2%
|
| 4 | Annually | 3002 |
16.7%
|
| 5 | Never | 10753 |
59.8%
|
| 6 | Don't Know | 275 |
1.5%
|
| Sysmiss | 5514 |