| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every week | 10 |
1.4%
|
| 2 | Every two weeks | 80 |
11%
|
| 3 | Every month | 195 |
26.7%
|
| 4 | Every three months | 402 |
55.1%
|
| 5 | Never | 43 |
5.9%
|
| 11 | .A | 4 | |
| Sysmiss | 606 |