| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every week | 3 |
0.4%
|
| 2 | Every two weeks | 19 |
2.6%
|
| 3 | Every month | 224 |
30.7%
|
| 4 | Every two months | 19 |
2.6%
|
| 5 | Every three months | 249 |
34.1%
|
| 6 | Twice per year | 104 |
14.2%
|
| 7 | Once per year | 69 |
9.5%
|
| 8 | Never | 43 |
5.9%
|
| 999 | Other, specify | 0 |
0%
|
| 11 | .A | 4 | |
| Sysmiss | 606 |