| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 13 |
14.9%
|
| 2 | Monthly | 38 |
43.7%
|
| 3 | Less than once a month | 33 |
37.9%
|
| 4 | Don't know | 2 |
2.3%
|
| 5 | Refused | 1 |
1.1%
|
| Sysmiss | 913 |