| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 6 |
4.3%
|
| 2 | Monthly | 31 |
22.5%
|
| 3 | Less than once a month | 79 |
57.2%
|
| 4 | Never | 17 |
12.3%
|
| 5 | Don't know | 2 |
1.4%
|
| 6 | Refused | 3 |
2.2%
|
| Sysmiss | 862 |