| Value | Category | Cases | |
|---|---|---|---|
| 0 | 2013 | 
                                                                 
                                    
                                    97.6%
                                 
                                                             | 
                                                        
                    |
| 1 | 45 | 
                                                                 
                                    
                                    2.2%
                                 
                                                             | 
                                                        
                    |
| Missing value | 4 | 
                                                                 
                                    
                                    0.2%
                                 
                                                             |