| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 6 |
4.3%
|
| 2 | Monthly | 28 |
20.3%
|
| 3 | Less than once a month | 82 |
59.4%
|
| 4 | Never | 17 |
12.3%
|
| 5 | Don't know | 4 |
2.9%
|
| 6 | Refused | 1 |
0.7%
|
| Sysmiss | 862 |