| Value | Category | Cases | |
|---|---|---|---|
| -888 | Other: specify | 2 | 
                                    
                                    1.6%
                                 | 
| 1 | Daily | 0 | 
                                    
                                    0%
                                 | 
| 2 | Once a week | 7 | 
                                    
                                    5.5%
                                 | 
| 3 | Twice a month | 19 | 
                                    
                                    14.8%
                                 | 
| 4 | Monthly | 95 | 
                                    
                                    74.2%
                                 | 
| 5 | As necessary | 5 | 
                                    
                                    3.9%
                                 | 
| Sysmiss | 3 |