| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 133 |
22.1%
|
| 2 | Monthly | 151 |
25.1%
|
| 3 | Less than once a month | 296 |
49.2%
|
| 4 | Never | 14 |
2.3%
|
| 5 | Don't know | 5 |
0.8%
|
| 6 | Refused | 3 |
0.5%
|
| Sysmiss | 398 |