| Value | Category | Cases | |
|---|---|---|---|
| 2016 | 613 | 
                                    
                                    9.9%
                                 | |
| 2017 | 964 | 
                                    
                                    15.5%
                                 | |
| 2018 | 1061 | 
                                    
                                    17%
                                 | |
| 2019 | 137 | 
                                    
                                    2.2%
                                 | |
| 9999 | NO RESPONSE | 6 | 
                                    
                                    0.1%
                                 | 
| Sysmiss | 3442 | 
                                    
                                    55.3%
                                 |