| Value | Category | Cases | |
|---|---|---|---|
| -888 | Other: specify | 8 | 
                                    
                                    20%
                                 | 
| 1 | Daily | 0 | 
                                    
                                    0%
                                 | 
| 2 | Once a week | 0 | 
                                    
                                    0%
                                 | 
| 3 | Twice a month | 2 | 
                                    
                                    5%
                                 | 
| 4 | Monthly | 23 | 
                                    
                                    57.5%
                                 | 
| 5 | As necessary | 7 | 
                                    
                                    17.5%
                                 | 
| Sysmiss | 91 |