| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 11 |
4.4%
|
| 2 | Monthly | 142 |
56.3%
|
| 3 | Less than once a month | 89 |
35.3%
|
| 4 | Don't know | 6 |
2.4%
|
| 5 | Refused | 4 |
1.6%
|
| Sysmiss | 748 |