| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 61 |
17.4%
|
| 2 | Monthly | 139 |
39.6%
|
| 3 | Less than once a month | 138 |
39.3%
|
| 4 | Don't know | 8 |
2.3%
|
| 5 | Refused | 5 |
1.4%
|
| Sysmiss | 649 |