| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 15 |
5.2%
|
| 2 | Monthly | 179 |
61.5%
|
| 3 | Less than once a month | 76 |
26.1%
|
| 4 | Never | 18 |
6.2%
|
| 5 | Don't know | 1 |
0.3%
|
| 6 | Refused | 2 |
0.7%
|
| Sysmiss | 709 |