| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every week | 23 |
4.4%
|
| 2 | Every two weeks | 14 |
2.7%
|
| 3 | Every month | 251 |
48.4%
|
| 4 | Every three months | 80 |
15.4%
|
| 5 | Every six months | 12 |
2.3%
|
| 6 | Every year | 16 |
3.1%
|
| 7 | One off | 123 |
23.7%
|
| 9 | Refusal | 0 |
0%
|
| Sysmiss | 2838 |