| Value | Category | 
                                    
                    
                        | 1 | No formal education | 
                                    
                    
                        | 10 | Kindergarten | 
                                    
                    
                        | 11 | Elementary grade 1 | 
                                    
                    
                        | 12 | Elementary grade 2 | 
                                    
                    
                        | 13 | Elementary grade 3 | 
                                    
                    
                        | 14 | Elementary grade 4 | 
                                    
                    
                        | 15 | Elementary grade 5 | 
                                    
                    
                        | 16 | Elementary grade 6 | 
                                    
                    
                        | 17 | Elementary grade 7 | 
                                    
                    
                        | 19 | Elementary grade not specified | 
                                    
                    
                        | 20 | Secondary grade 1 | 
                                    
                    
                        | 21 | Secondary grade 1 | 
                                    
                    
                        | 22 | Secondary grade 2 | 
                                    
                    
                        | 23 | Secondary grade 3 | 
                                    
                    
                        | 24 | Secondary grade 4 | 
                                    
                    
                        | 25 | Secondary grade 5 | 
                                    
                    
                        | 26 | Secondary grade 6 | 
                                    
                    
                        | 29 | Secondary grade not specified | 
                                    
                    
                        | 31 | University, 1st year | 
                                    
                    
                        | 32 | University, 2nd year | 
                                    
                    
                        | 33 | University, 3rd year | 
                                    
                    
                        | 34 | University, 4th year | 
                                    
                    
                        | 35 | University, 5th year | 
                                    
                    
                        | 36 | University, 6th year | 
                                    
                    
                        | 37 | Bachelor's degree | 
                                    
                    
                        | 38 | Higher than bachelor's degree | 
                                    
                    
                        | 39 | University level not specified | 
                                    
                    
                        | 40 | Lower vocational | 
                                    
                    
                        | 50 | Upper vocational | 
                                    
                    
                        | 60 | High vocational | 
                                    
                    
                        | 61 | Teacher training | 
                                    
                    
                        | 62 | Technical and advanced vocational | 
                                    
                    
                        | 90 | Other education | 
                                    
                    
                        | 99 | Unknown or not reported | 
                            
            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.