| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 24 |
7.1%
|
| 2 | Monthly | 164 |
48.7%
|
| 3 | Less than once a month | 87 |
25.8%
|
| 4 | Never | 30 |
8.9%
|
| 5 | Don't know | 32 |
9.5%
|
| 6 | Refused | 0 |
0%
|
| Sysmiss | 671 |