| Value | Category | Cases | |
|---|---|---|---|
| -888 | Other: specify | 0 | 
                                    
                                    0%
                                 | 
| 1 | Daily | 1 | 
                                    
                                    1.4%
                                 | 
| 2 | Once a week | 0 | 
                                    
                                    0%
                                 | 
| 3 | Twice a month | 1 | 
                                    
                                    1.4%
                                 | 
| 4 | Monthly | 26 | 
                                    
                                    37.1%
                                 | 
| 5 | As necessary | 37 | 
                                    
                                    52.9%
                                 | 
| 6 | Not available | 5 | 
                                    
                                    7.1%
                                 | 
| Sysmiss | 61 |