| Value | Category | Cases | |
|---|---|---|---|
| 1 | Once a week or more | 45 |
10.1%
|
| 2 | Every 2 weeks | 30 |
6.7%
|
| 3 | Once a month | 362 |
81.2%
|
| 4 | Once in 6 months | 4 |
0.9%
|
| 5 | Only once | 5 |
1.1%
|
| Sysmiss | 67 |