| Value | Category | Cases | |
|---|---|---|---|
| -888 | Other: specify | 25 | 
                                    
                                    20.8%
                                 | 
| 1 | Daily | 2 | 
                                    
                                    1.7%
                                 | 
| 2 | Once a week | 0 | 
                                    
                                    0%
                                 | 
| 3 | Twice a month | 3 | 
                                    
                                    2.5%
                                 | 
| 4 | Monthly | 84 | 
                                    
                                    70%
                                 | 
| 5 | As necessary | 6 | 
                                    
                                    5%
                                 | 
| Sysmiss | 11 |