| Value | Category | Cases | |
|---|---|---|---|
| 1 | Annually | 20 |
5.6%
|
| 2 | Bi-annually | 4 |
1.1%
|
| 3 | Fortnightly | 4 |
1.1%
|
| 4 | Monthly | 19 |
5.3%
|
| 5 | Quarterly | 11 |
3.1%
|
| 6 | Weekly | 1 |
0.3%
|
| Missing value | 301 |
83.6%
|