| Value | Category | Cases | |
|---|---|---|---|
| -998 | Dont know | 9 | 
                                    
                                    6.9%
                                 | 
| -888 | Other (specify) | 4 | 
                                    
                                    3.1%
                                 | 
| 1 | Less than once a month | 24 | 
                                    
                                    18.3%
                                 | 
| 2 | Once a month | 82 | 
                                    
                                    62.6%
                                 | 
| 3 | Twice a month | 12 | 
                                    
                                    9.2%
                                 |