| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 29 |
6.1%
|
| 2 | Monthly | 251 |
52.6%
|
| 3 | Less than once a month | 175 |
36.7%
|
| 4 | Don't know | 21 |
4.4%
|
| 5 | Refused | 1 |
0.2%
|
| Sysmiss | 523 |