| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 37 |
14.4%
|
| 2 | Monthly | 151 |
58.8%
|
| 3 | Less than once a month | 62 |
24.1%
|
| 4 | Don't know | 1 |
0.4%
|
| 5 | Refused | 6 |
2.3%
|
| Sysmiss | 743 |