| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 17 | 
                                    
                                    8.8%
                                 | 
| 2 | Every few weeks | 53 | 
                                    
                                    27.3%
                                 | 
| 3 | Every few months | 76 | 
                                    
                                    39.2%
                                 | 
| 4 | Not at all | 48 | 
                                    
                                    24.7%
                                 | 
| Sysmiss | 44 |