| Value | Category | Cases | |
|---|---|---|---|
| -9 | DK | 0 | 
                                    
                                    0%
                                 | 
| 1 | Daily | 0 | 
                                    
                                    0%
                                 | 
| 2 | Weekly | 0 | 
                                    
                                    0%
                                 | 
| 3 | Fortnightly | 0 | 
                                    
                                    0%
                                 | 
| 4 | Monthly | 1 | 
                                    
                                    0.9%
                                 | 
| 5 | Quarterly | 0 | 
                                    
                                    0%
                                 | 
| 6 | Semi-annually | 0 | 
                                    
                                    0%
                                 | 
| 7 | Yearly | 0 | 
                                    
                                    0%
                                 | 
| 8 | None | 106 | 
                                    
                                    99.1%
                                 | 
| Sysmiss | 1971 |