| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 22 |
6.6%
|
| 2 | Monthly | 222 |
66.7%
|
| 3 | Less than once a month | 23 |
6.9%
|
| 4 | Never | 53 |
15.9%
|
| 5 | Don't know | 11 |
3.3%
|
| 6 | Refused | 2 |
0.6%
|
| Sysmiss | 667 |