| Value | Category | Cases | |
|---|---|---|---|
| -998 | Dont know | 30 | 
                                    
                                    22.9%
                                 | 
| -888 | Other specify | 2 | 
                                    
                                    1.5%
                                 | 
| 1 | Less than once a month | 20 | 
                                    
                                    15.3%
                                 | 
| 2 | Once a month | 73 | 
                                    
                                    55.7%
                                 | 
| 3 | Twice a month | 6 | 
                                    
                                    4.6%
                                 |