| Value | Category | Cases | |
|---|---|---|---|
| 0 | 6 | 
                                                                 
                                    
                                    1.3%
                                 
                                                             | 
                                                        
                    |
| 1 | 44 | 
                                                                 
                                    
                                    9.6%
                                 
                                                             | 
                                                        
                    |
| 2 | 277 | 
                                                                 
                                    
                                    60.3%
                                 
                                                             | 
                                                        
                    |
| 3 | 11 | 
                                                                 
                                    
                                    2.4%
                                 
                                                             | 
                                                        
                    |
| 4 | 10 | 
                                                                 
                                    
                                    2.2%
                                 
                                                             | 
                                                        
                    |
| Missing value | 111 | 
                                                                 
                                    
                                    24.2%
                                 
                                                             |