| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 61 |
16.9%
|
| 2 | Monthly | 123 |
34.1%
|
| 3 | Less than once a month | 172 |
47.6%
|
| 4 | Don't know | 4 |
1.1%
|
| 5 | Refused | 1 |
0.3%
|
| Sysmiss | 639 |