| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 27 | 
                                    
                                    10%
                                 | 
| 2 | Every few weeks | 34 | 
                                    
                                    12.6%
                                 | 
| 3 | Every few months | 68 | 
                                    
                                    25.3%
                                 | 
| 4 | Not at all | 140 | 
                                    
                                    52%
                                 | 
| Sysmiss | 50 |