| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 14 |
3.7%
|
| 2 | Monthly | 271 |
72.3%
|
| 3 | Less than once a month | 37 |
9.9%
|
| 4 | Never | 48 |
12.8%
|
| 5 | Don't know | 4 |
1.1%
|
| 6 | Refused | 1 |
0.3%
|
| Sysmiss | 631 |