| Value | Category | Cases | |
|---|---|---|---|
| 1 | Within the last 12 months | 537 | 
                                                                 
                                    
                                    2.2%
                                 
                                                             | 
                                                        
                    
| 2 | 1 - 2 years ago | 367 | 
                                                                 
                                    
                                    1.5%
                                 
                                                             | 
                                                        
                    
| 3 | 2 - 3 years ago | 356 | 
                                                                 
                                    
                                    1.5%
                                 
                                                             | 
                                                        
                    
| 4 | More than 3 years ago | 1629 | 
                                                                 
                                    
                                    6.7%
                                 
                                                             | 
                                                        
                    
| 5 | Never | 21518 | 
                                                                 
                                    
                                    88.2%
                                 
                                                             |