| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 28 |
9.2%
|
| 2 | Monthly | 172 |
56.4%
|
| 3 | Less than once a month | 68 |
22.3%
|
| 4 | Don't know | 33 |
10.8%
|
| 5 | Refused | 4 |
1.3%
|
| Sysmiss | 703 |