| Value | Category | Cases | |
|---|---|---|---|
| 1 | Never | 5115 | 
                                                                 
                                    
                                    46.9%
                                 
                                                             | 
                                                        
                    
| 2 | 1-3 times | 4605 | 
                                                                 
                                    
                                    42.2%
                                 
                                                             | 
                                                        
                    
| 3 | 3+ times | 1183 | 
                                                                 
                                    
                                    10.9%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 13 |