| Value | Category | Cases | |
|---|---|---|---|
| -888 | Other: specify | 1 | 
                                    
                                    0.8%
                                 | 
| 1 | Daily | 0 | 
                                    
                                    0%
                                 | 
| 2 | Once a week | 0 | 
                                    
                                    0%
                                 | 
| 3 | Twice a month | 5 | 
                                    
                                    4%
                                 | 
| 4 | Monthly | 117 | 
                                    
                                    92.9%
                                 | 
| 5 | As necessary | 3 | 
                                    
                                    2.4%
                                 | 
| Sysmiss | 5 |