| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 10 |
2.8%
|
| 2 | Monthly | 192 |
54.1%
|
| 3 | Less than once a month | 60 |
16.9%
|
| 4 | Never | 70 |
19.7%
|
| 5 | Don't know | 22 |
6.2%
|
| 6 | Refused | 1 |
0.3%
|
| Sysmiss | 665 |