| Value | Category | Cases | |
|---|---|---|---|
| 1 | Never | 1270 | 
                                                                 
                                    
                                    11.6%
                                 
                                                             | 
                                                        
                    
| 2 | 1-3 times | 5453 | 
                                                                 
                                    
                                    50%
                                 
                                                             | 
                                                        
                    
| 3 | 3+ times | 4180 | 
                                                                 
                                    
                                    38.3%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 13 |