| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 20 |
7.7%
|
| 2 | Monthly | 171 |
65.5%
|
| 3 | Less than once a month | 52 |
19.9%
|
| 4 | Don't know | 12 |
4.6%
|
| 5 | Refused | 6 |
2.3%
|
| Sysmiss | 739 |