| Value | Category | Cases | |
|---|---|---|---|
| 1 | Never | 278 | 
                                                                 
                                    
                                    2.5%
                                 
                                                             | 
                                                        
                    
| 2 | 1-3 times | 6815 | 
                                                                 
                                    
                                    62.5%
                                 
                                                             | 
                                                        
                    
| 3 | 3+ times | 3810 | 
                                                                 
                                    
                                    34.9%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 13 |