| Value | Category | 
                                    
                    
                        | 000 | NIU (not in universe) | 
                                    
                    
                        | 100 | No education | 
                                    
                    
                        | 110 | Literate or literacy program | 
                                    
                    
                        | 120 | Non-regular education | 
                                    
                    
                        | 130 | Pre-school | 
                                    
                    
                        | 201 | Basic education, Grade 1 | 
                                    
                    
                        | 202 | Basic education, Grade 2 | 
                                    
                    
                        | 203 | Basic education, Grade 3 | 
                                    
                    
                        | 204 | Basic education, Grade 4 | 
                                    
                    
                        | 205 | Basic education, Grade 5 | 
                                    
                    
                        | 206 | Basic education, Grade 6 | 
                                    
                    
                        | 207 | Basic education, Grade 7 | 
                                    
                    
                        | 208 | Basic education, Grade 8 | 
                                    
                    
                        | 209 | Basic education, Grade 9 | 
                                    
                    
                        | 210 | Basic education, Grade 10 | 
                                    
                    
                        | 211 | Basic education, Grade 11 | 
                                    
                    
                        | 212 | Basic education, Grade 12 | 
                                    
                    
                        | 300 | Certificate level 1 (10+1) | 
                                    
                    
                        | 310 | Certificate level 2 (10+2) | 
                                    
                    
                        | 311 | Certificate level 2 (10+2), incomplete | 
                                    
                    
                        | 312 | Certificate level 2 (10+2), complete | 
                                    
                    
                        | 320 | Diploma (10+3) | 
                                    
                    
                        | 321 | Diploma (10+3), year 1 | 
                                    
                    
                        | 322 | Diploma (10+3), year 2 | 
                                    
                    
                        | 323 | Diploma (10+3), complete | 
                                    
                    
                        | 400 | Certificate or diploma | 
                                    
                    
                        | 410 | Certificate | 
                                    
                    
                        | 420 | Diploma | 
                                    
                    
                        | 421 | Diploma, incomplete | 
                                    
                    
                        | 422 | Diploma, complete | 
                                    
                    
                        | 430 | Bachelor | 
                                    
                    
                        | 431 | Bachelor, incomplete | 
                                    
                    
                        | 432 | Bachelor, complete | 
                                    
                    
                        | 440 | Graduate school | 
                                    
                    
                        | 441 | Graduate, incomplete | 
                                    
                    
                        | 442 | Graduate, masters | 
                                    
                    
                        | 443 | Graduate, doctorate | 
                                    
                    
                        | 998 | Unknown | 
                            
            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.