| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 2 |
1.5%
|
| 2 | Monthly | 54 |
41.5%
|
| 3 | Less than once a month | 67 |
51.5%
|
| 4 | Don't know | 3 |
2.3%
|
| 5 | Refused | 4 |
3.1%
|
| Sysmiss | 871 |