| Value | Category | 
                                    
                    
                        | 0 | K.G, 0 grade (preparatory), nursery, or 1st grade ? cannot read and write | 
                                    
                    
                        | 1 | Completed 1st grade ? can read and write or cannot read and write | 
                                    
                    
                        | 2 | Completed 2nd grade ? can read and write or cannot read and write | 
                                    
                    
                        | 3 | Completed 3rd grade ? can read and write or cannot read and write | 
                                    
                    
                        | 4 | Completed 4th grade ? can read and write or cannot read and write | 
                                    
                    
                        | 5 | Completed 5th grade | 
                                    
                    
                        | 6 | Completed 6th grade | 
                                    
                    
                        | 7 | Completed 7th grade | 
                                    
                    
                        | 8 | Completed 8th grade | 
                                    
                    
                        | 9 | Completed 9th grade | 
                                    
                    
                        | 10 | Completed 10th grade | 
                                    
                    
                        | 11 | Completed 11th grade | 
                                    
                    
                        | 12 | Completed 12th grade and has taken the ESLC exam ? passed the exam or did not pass | 
                                    
                    
                        | 13 | Completed grade 12+1 | 
                                    
                    
                        | 14 | Completed Teacher Training Certificate | 
                                    
                    
                        | 15 | Completed 12+1 years for diploma or above course | 
                                    
                    
                        | 16 | Completed 12+2 years for diploma or above program | 
                                    
                    
                        | 17 | Completed diploma course | 
                                    
                    
                        | 18 | Completed 3rd year course | 
                                    
                    
                        | 19 | Completed a bachelor degree program (non-specialized) including MD | 
                                    
                    
                        | 20 | Postgraduate diploma, M.A, Ph.D., MPhil, etc. | 
                                    
                    
                        | 21 | Completed 9th grade | 
                                    
                    
                        | 22 | Completed 10th grade, passed the exam or not | 
                                    
                    
                        | 23 | Competed 11th grade | 
                                    
                    
                        | 24 | Completed 12th grade | 
                                    
                    
                        | 25 | Completed certificate in 10+1 vocational and technical course | 
                                    
                    
                        | 26 | Completed 1 year course in 10+2 or level 2 vocational and technical course | 
                                    
                    
                        | 27 | Completed certificate in 10+2 vocational and technical course | 
                                    
                    
                        | 28 | Completed 1 year in 10+3 or level 3 vocational and technical course | 
                                    
                    
                        | 29 | Completed 2 years in 10+3 or level 3 vocational and technical course | 
                                    
                    
                        | 30 | Completed diploma in 10+3 or level 3 vocational and technical course | 
                                    
                    
                        | 31 | Completed 1 year course in bachelor degree or level 4 program | 
                                    
                    
                        | 32 | Completed 2 years in  bachelor degree or level 4 program | 
                                    
                    
                        | 33 | Completed 3 years or more in  bachelor program but did not complete bachelor degree | 
                                    
                    
                        | 34 | Completed bachelor degree or level 4 | 
                                    
                    
                        | 35 | Completed bachelor degree and attending level 5 or 1 year  postgraduate degree/M.L/PhD | 
                                    
                    
                        | Sysmiss |  | 
                            
            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.