| Value | Category | 
                                    
                    
                        | 000 | Less than primary | 
                                    
                    
                        | 010 | None, or never attended school | 
                                    
                    
                        | 020 | Preschool or kindergarten | 
                                    
                    
                        | 021 | Preschool, 1 year | 
                                    
                    
                        | 022 | Preschool, 2 years | 
                                    
                    
                        | 023 | Preschool, 3 years | 
                                    
                    
                        | 029 | Preschool, years unspecified | 
                                    
                    
                        | 100 | Primary | 
                                    
                    
                        | 101 | Primary, 1 year | 
                                    
                    
                        | 102 | Primary, 2 years | 
                                    
                    
                        | 103 | Primary, 3 years | 
                                    
                    
                        | 104 | Primary, 4 years | 
                                    
                    
                        | 105 | Primary, 5 years | 
                                    
                    
                        | 106 | Primary, 6 years | 
                                    
                    
                        | 109 | Primary, years unspecified | 
                                    
                    
                        | 200 | Lower secondary (middle or junior high school) | 
                                    
                    
                        | 210 | Lower secondary, tech/commercial | 
                                    
                    
                        | 211 | Lower secondary, tech/commercial, 1 year | 
                                    
                    
                        | 212 | Lower secondary, tech/commercial, 2 years | 
                                    
                    
                        | 213 | Lower secondary, tech/commercial, 3 years | 
                                    
                    
                        | 214 | Lower secondary, tech/commercial, 4 years | 
                                    
                    
                        | 219 | Lower secondary, tech/commercial, years unspecified | 
                                    
                    
                        | 220 | Lower secondary, general track | 
                                    
                    
                        | 221 | Lower secondary, general track, 1 year | 
                                    
                    
                        | 222 | Lower secondary, general track, 2 years | 
                                    
                    
                        | 223 | Lower secondary, general track, 3 years | 
                                    
                    
                        | 229 | Lower secondary, general track, years unspecified | 
                                    
                    
                        | 300 | Secondary (high school) | 
                                    
                    
                        | 310 | Secondary tech/commercial | 
                                    
                    
                        | 311 | Secondary tech/commercial, 1 year | 
                                    
                    
                        | 312 | Secondary tech/commercial, 2 years | 
                                    
                    
                        | 313 | Secondary tech/commercial, 3 years | 
                                    
                    
                        | 314 | Secondary tech/commercial, 4 years | 
                                    
                    
                        | 315 | Secondary tech/commercial, 5 years | 
                                    
                    
                        | 319 | Secondary tech/commercial, years unspecified | 
                                    
                    
                        | 320 | Secondary, general track | 
                                    
                    
                        | 321 | Secondary, general track, 1 year | 
                                    
                    
                        | 322 | Secondary, general track, 2 years | 
                                    
                    
                        | 323 | Secondary, general track, 3 years | 
                                    
                    
                        | 329 | Secondary, general track, years unspecified | 
                                    
                    
                        | 330 | Technological track | 
                                    
                    
                        | 331 | Secondary, technological track, year 1 | 
                                    
                    
                        | 332 | Secondary, technological track, years 2 | 
                                    
                    
                        | 333 | Secondary, technological track, years 3 | 
                                    
                    
                        | 339 | Secondary, technological track, year unspecified | 
                                    
                    
                        | 400 | Normal school (teacher-training) | 
                                    
                    
                        | 401 | Normal, 1 year | 
                                    
                    
                        | 402 | Normal, 2 years | 
                                    
                    
                        | 403 | Normal, 3 years | 
                                    
                    
                        | 404 | Normal, 4 years | 
                                    
                    
                        | 409 | Normal, years unspecified | 
                                    
                    
                        | 500 | Post-secondary technical | 
                                    
                    
                        | 501 | Post-secondary technical, 1 year | 
                                    
                    
                        | 502 | Post-secondary technical, 2 years | 
                                    
                    
                        | 503 | Post-secondary technical, 3 years | 
                                    
                    
                        | 504 | Post-secondary technical, 4 years | 
                                    
                    
                        | 505 | Post-secondary technical, 5 years | 
                                    
                    
                        | 509 | Post-secondary technical, years unspecified | 
                                    
                    
                        | 600 | University | 
                                    
                    
                        | 610 | University undergraduate | 
                                    
                    
                        | 611 | University undergraduate, 1 year | 
                                    
                    
                        | 612 | University undergraduate, 2 years | 
                                    
                    
                        | 613 | University undergraduate, 3 years | 
                                    
                    
                        | 614 | University undergraduate, 4 years | 
                                    
                    
                        | 615 | University undergraduate, 5 years | 
                                    
                    
                        | 616 | University undergraduate, 6 years | 
                                    
                    
                        | 617 | University undergraduate, 7 years | 
                                    
                    
                        | 618 | University undergraduate, 8+ years | 
                                    
                    
                        | 619 | University undergraduate, years unspecified | 
                                    
                    
                        | 620 | University graduate | 
                                    
                    
                        | 621 | University graduate, 1 year | 
                                    
                    
                        | 622 | University graduate, 2 years | 
                                    
                    
                        | 623 | University graduate, 3 years | 
                                    
                    
                        | 624 | University graduate, 4 years | 
                                    
                    
                        | 625 | University graduate, 5 years | 
                                    
                    
                        | 626 | University graduate, 6 years | 
                                    
                    
                        | 627 | University graduate, 7 years | 
                                    
                    
                        | 628 | University graduate, 8+ years | 
                                    
                    
                        | 629 | University graduate, years unspecified | 
                                    
                    
                        | 630 | Masters degree (2005-2015) | 
                                    
                    
                        | 631 | Masters, 1 year | 
                                    
                    
                        | 632 | Masters, 2 years | 
                                    
                    
                        | 633 | Masters, 3+ years | 
                                    
                    
                        | 639 | Masters, year unspecified | 
                                    
                    
                        | 640 | Doctoral degree (2005-2015) | 
                                    
                    
                        | 641 | Doctoral, 1 year | 
                                    
                    
                        | 642 | Doctoral, 2 years | 
                                    
                    
                        | 643 | Doctoral, 3 years | 
                                    
                    
                        | 644 | Doctoral, 4 years | 
                                    
                    
                        | 645 | Doctoral, 5 years | 
                                    
                    
                        | 646 | Doctoral, 6 years | 
                                    
                    
                        | 649 | Doctoral, years unspecified | 
                                    
                    
                        | 650 | Specialty degree (2015) | 
                                    
                    
                        | 651 | Specialty, 1 year | 
                                    
                    
                        | 652 | Specialty, 2 years | 
                                    
                    
                        | 659 | Specialty, years unspecified | 
                                    
                    
                        | 700 | Unspecified post-secondary | 
                                    
                    
                        | 701 | Unspecified post-secondary, 1 year | 
                                    
                    
                        | 702 | Unspecified post-secondary, 2 years | 
                                    
                    
                        | 703 | Unspecified post-secondary, 3 years | 
                                    
                    
                        | 704 | Unspecified post-secondary, 4 years | 
                                    
                    
                        | 705 | Unspecified post-secondary, 5 years | 
                                    
                    
                        | 706 | Unspecified post-secondary, 6 years | 
                                    
                    
                        | 707 | Unspecified post-secondary, 7 years | 
                                    
                    
                        | 708 | Unspecified post-secondary, 8+ years | 
                                    
                    
                        | 800 | Unknown/missing | 
                                    
                    
                        | 999 | NIU (not in universe) | 
                            
            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.