| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 224 |
8.4%
|
| 2 | Monthly | 841 |
31.4%
|
| 3 | Less than once a month | 980 |
36.6%
|
| 4 | Never | 620 |
23.2%
|
| 5 | Don't know | 9 |
0.3%
|
| 6 | Refused | 2 |
0.1%
|
| Sysmiss | 324 |