| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 8 |
1.8%
|
| 2 | Monthly | 268 |
60.1%
|
| 3 | Less than once a month | 144 |
32.3%
|
| 4 | Don't know | 12 |
2.7%
|
| 5 | Refused | 14 |
3.1%
|
| Sysmiss | 557 |