| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 8 |
3.6%
|
| 2 | Monthly | 79 |
35.9%
|
| 3 | Less than once a month | 87 |
39.5%
|
| 4 | Never | 42 |
19.1%
|
| 5 | Don't know | 1 |
0.5%
|
| 6 | Refused | 3 |
1.4%
|
| Sysmiss | 780 |