| Value | Category | Cases | |
|---|---|---|---|
| 1 | once a week | 141 |
42.1%
|
| 2 | every two weeks | 15 |
4.5%
|
| 3 | once a month | 173 |
51.6%
|
| 4 | every three months | 5 |
1.5%
|
| 5 | every six months | 0 |
0%
|
| 6 | once a year | 1 |
0.3%
|
| 7 | less than once a year | 0 |
0%
|
| Sysmiss | 282 |