| Value | Category | Cases | |
|---|---|---|---|
| -888 | Other: specify | 1 | 
                                    
                                    0.8%
                                 | 
| 1 | Daily | 4 | 
                                    
                                    3.1%
                                 | 
| 2 | Once a week | 20 | 
                                    
                                    15.5%
                                 | 
| 3 | Twice a month | 26 | 
                                    
                                    20.2%
                                 | 
| 4 | Monthly | 61 | 
                                    
                                    47.3%
                                 | 
| 5 | As necessary | 17 | 
                                    
                                    13.2%
                                 | 
| Sysmiss | 2 |