| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 33 |
6.5%
|
| 2 | Monthly | 199 |
39.5%
|
| 3 | Less than once a month | 239 |
47.4%
|
| 4 | Never | 29 |
5.8%
|
| 5 | Don't know | 3 |
0.6%
|
| 6 | Refused | 1 |
0.2%
|
| Sysmiss | 564 |