| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 4 |
11.4%
|
| 2 | Monthly | 21 |
60%
|
| 3 | Less than once a month | 9 |
25.7%
|
| 4 | Don't know | 1 |
2.9%
|
| 5 | Refused | 0 |
0%
|
| Sysmiss | 973 |