| Value | Category | Cases | |
|---|---|---|---|
| -888 | Other: specify | 0 | 
                                    
                                    0%
                                 | 
| 1 | Daily | 0 | 
                                    
                                    0%
                                 | 
| 2 | Once a week | 0 | 
                                    
                                    0%
                                 | 
| 3 | Twice a month | 3 | 
                                    
                                    6.1%
                                 | 
| 4 | Monthly | 25 | 
                                    
                                    51%
                                 | 
| 5 | As necessary | 8 | 
                                    
                                    16.3%
                                 | 
| 6 | Not available | 13 | 
                                    
                                    26.5%
                                 | 
| Sysmiss | 82 |