| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 16 |
3.5%
|
| 2 | Monthly | 242 |
53.5%
|
| 3 | Less than once a month | 154 |
34.1%
|
| 4 | Don't know | 28 |
6.2%
|
| 5 | Refused | 12 |
2.7%
|
| Sysmiss | 548 |