| Value | Category | Cases | |
|---|---|---|---|
| 2017 | 793 | 
                                    
                                    12.4%
                                 | |
| 2018 | 1054 | 
                                    
                                    16.5%
                                 | |
| 2019 | 1128 | 
                                    
                                    17.6%
                                 | |
| 2020 | 8 | 
                                    
                                    0.1%
                                 | |
| 9999 | NO RESPONSE | 4 | 
                                    
                                    0.1%
                                 | 
| Sysmiss | 3407 | 
                                    
                                    53.3%
                                 |