| Value | Category | Cases | |
|---|---|---|---|
| 2013 | 557 | 
                                                                 
                                    
                                    13.2%
                                 
                                                             | 
                                                        
                    |
| 2014 | 893 | 
                                                                 
                                    
                                    21.1%
                                 
                                                             | 
                                                        
                    |
| 2015 | 933 | 
                                                                 
                                    
                                    22%
                                 
                                                             | 
                                                        
                    |
| 2016 | 804 | 
                                                                 
                                    
                                    19%
                                 
                                                             | 
                                                        
                    |
| 2017 | 773 | 
                                                                 
                                    
                                    18.3%
                                 
                                                             | 
                                                        
                    |
| 2018 | 274 | 
                                                                 
                                    
                                    6.5%
                                 
                                                             | 
                                                        
                    |
| 9999 | No response | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 420 |