| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 37 |
8.4%
|
| 2 | Monthly | 149 |
33.9%
|
| 3 | Less than once a month | 221 |
50.2%
|
| 4 | Never | 29 |
6.6%
|
| 5 | Don't know | 3 |
0.7%
|
| 6 | Refused | 1 |
0.2%
|
| Sysmiss | 561 |