| Value | Category | 
                                    
                    
                        | 0 | NR | 
                                    
                    
                        | 1 | Scheduled tribe | 
                                    
                    
                        | 2 | Scheduled caste | 
                                    
                    
                        | 3 | Other backward class | 
                                    
                    
                        | 4 |  | 
                                    
                    
                        | 5 |  | 
                                    
                    
                        | 8 | Invalid | 
                                    
                    
                        | 9 | Others | 
                            
            Warning: these figures indicate the number of cases found in the data file. They cannot be interpreted as summary statistics of the population of interest.