| Value | Category | Cases | |
|---|---|---|---|
| 1 | Never | 326 |
11.4%
|
| 2 | Monthly | 742 |
25.9%
|
| 3 | Quarterly | 822 |
28.7%
|
| 4 | Bi-Annually | 83 |
2.9%
|
| 5 | Annually | 345 |
12.1%
|
| 6 | Ad hoc | 508 |
17.7%
|
| 7 | Don't know | 34 |
1.2%
|
| 9 | Missing value | 3 |
0.1%
|