| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 11 |
4.4%
|
| 2 | Monthly | 159 |
64.1%
|
| 3 | Less than once a month | 73 |
29.4%
|
| 4 | Don't know | 1 |
0.4%
|
| 5 | Refused | 4 |
1.6%
|
| Sysmiss | 752 |