| Value | Category | Cases | |
|---|---|---|---|
| 2015 | 155 | 
                                    
                                    21.7%
                                 | |
| 2016 | 558 | 
                                    
                                    78%
                                 | |
| 2017 | 2 | 
                                    
                                    0.3%
                                 | |
| Sysmiss | 1842 |