| Value | Category | Cases | |
|---|---|---|---|
| 0 | Never | 34 | 
                                                                 
                                    
                                    6.9%
                                 
                                                             | 
                                                        
                    
| 1 | 1-2 times | 151 | 
                                                                 
                                    
                                    30.6%
                                 
                                                             | 
                                                        
                    
| 2 | 2-5 times | 72 | 
                                                                 
                                    
                                    14.6%
                                 
                                                             | 
                                                        
                    
| 3 | More than 5 times | 237 | 
                                                                 
                                    
                                    48%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 8595 |