| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 67 |
15.7%
|
| 2 | Monthly | 149 |
34.9%
|
| 3 | Less than once a month | 191 |
44.7%
|
| 4 | Don't know | 18 |
4.2%
|
| 5 | Refused | 2 |
0.5%
|
| Sysmiss | 573 |