| Value | Category | Cases | |
|---|---|---|---|
| 1 | Never | 4531 |
26.1%
|
| 2 | Monthly | 2763 |
15.9%
|
| 3 | Quarterly | 3180 |
18.3%
|
| 4 | Bi-Annually | 736 |
4.2%
|
| 5 | Annually | 2166 |
12.5%
|
| 6 | Ad hoc | 3649 |
21%
|
| 7 | Don't know | 315 |
1.8%
|
| 9 | Missing value | 5 |
0%
|