| Value | Category | 
                                    
                    
                        | 0000 | NIU (not in universe) | 
                                    
                    
                        | 1110 | Crop production | 
                                    
                    
                        | 1121 | Animal production | 
                                    
                    
                        | 1122 | Animal aquaculture | 
                                    
                    
                        | 1130 | Forestry and logging | 
                                    
                    
                        | 1141 | Fishing | 
                                    
                    
                        | 1142 | Hunting and trapping | 
                                    
                    
                        | 1150 | Support activities for agriculture and forestry | 
                                    
                    
                        | 2110 | Oil and gas extraction | 
                                    
                    
                        | 2121 | Coal mining | 
                                    
                    
                        | 2122 | Metal ore mining | 
                                    
                    
                        | 2123 | Nonmetallic mineral mining and quarrying | 
                                    
                    
                        | 2129 | Mining (except oil and gas), not specified | 
                                    
                    
                        | 2131 | Support activities for mining | 
                                    
                    
                        | 2132 | Oil and gas extraction | 
                                    
                    
                        | 2199 | Mining, not specified | 
                                    
                    
                        | 2210 | Electric power generation, transmission, and distribution | 
                                    
                    
                        | 2221 | Collection, treatment and supply of water | 
                                    
                    
                        | 2222 | Gas supply through pipelines to the final consumer | 
                                    
                    
                        | 2361 | Residential building construction | 
                                    
                    
                        | 2363 | Nonresidential building construction | 
                                    
                    
                        | 2370 | Heavy and civil engineering construction | 
                                    
                    
                        | 2381 | Specialty trade contractors | 
                                    
                    
                        | 2382 | Building equipment contractors | 
                                    
                    
                        | 2399 | Construction, not specified | 
                                    
                    
                        | 3110 | Food manufacturing | 
                                    
                    
                        | 3120 | Beverage and tobacco manufacturing | 
                                    
                    
                        | 3130 | Textile mills | 
                                    
                    
                        | 3140 | Textile product mills | 
                                    
                    
                        | 3150 | Apparel manufactung | 
                                    
                    
                        | 3160 | Leather and allied product manufacturing | 
                                    
                    
                        | 3210 | Wood product manufacturing | 
                                    
                    
                        | 3220 | Paper manufacturing | 
                                    
                    
                        | 3230 | Printing and related support activities | 
                                    
                    
                        | 3240 | Petroleum and coal products manufacturing | 
                                    
                    
                        | 3250 | Chemical manufactuing | 
                                    
                    
                        | 3260 | Plastics and rubber products manufacturing | 
                                    
                    
                        | 3270 | Nonmetallic mineral product manufacturing | 
                                    
                    
                        | 3310 | Primary metal manufacturing | 
                                    
                    
                        | 3320 | Fabricated metal product manufacturing | 
                                    
                    
                        | 3330 | Machinery manufacturing | 
                                    
                    
                        | 3340 | Computer and electronic product manufacturing | 
                                    
                    
                        | 3350 | Electrical equipment, appliance, and component manufacturing | 
                                    
                    
                        | 3360 | Transportation equipment manufacturing | 
                                    
                    
                        | 3370 | Furniture and related product manufacturing | 
                                    
                    
                        | 3380 | Other manufacturing industries | 
                                    
                    
                        | 3399 | Manufacturing, not specified | 
                                    
                    
                        | 4310 | Food, beverage, and tobacco merchant wholesale | 
                                    
                    
                        | 4320 | Textile and footwear merchant wholesale | 
                                    
                    
                        | 4330 | Pharmaceuticals, perfume, clothing, home entertainment equipment and household appliance merchant wholesale | 
                                    
                    
                        | 4340 | Farm product raw material, for industry and waste materials merchant wholesale | 
                                    
                    
                        | 4350 | Machinery, furniture, and equipment for agricultural, industrial and service activities merchant wholesale | 
                                    
                    
                        | 4360 | Trucks merchant wholesale | 
                                    
                    
                        | 4370 | Brokerage and wholesale trade by mass media and other media | 
                                    
                    
                        | 4399 | Wholesale trade, not specified | 
                                    
                    
                        | 4611 | Food, beverages and tobacco stores | 
                                    
                    
                        | 4612 | Food, beverages and tobacco street vendors | 
                                    
                    
                        | 4620 | Self-service and department stores | 
                                    
                    
                        | 4631 | Textile, clothing accessories, and footwear stores | 
                                    
                    
                        | 4632 | Textile, clothing accessories, and footwear street vendors | 
                                    
                    
                        | 4641 | Health care articles stores | 
                                    
                    
                        | 4642 | Health care articles street vendors | 
                                    
                    
                        | 4651 | Stationery, entertainment, and other articles for personal use stores | 
                                    
                    
                        | 4652 | Stationery, entertainment, and other articles for personal use street vendors | 
                                    
                    
                        | 4661 | Retail trade of household goods, computers, and items for interior decoration | 
                                    
                    
                        | 4662 | Street vendors of furniture, household goods, and used merchandise | 
                                    
                    
                        | 4671 | Retail trade of hardware and glass | 
                                    
                    
                        | 4672 | Street vendors of hardware | 
                                    
                    
                        | 4681 | Retail trade of motor vehicles, spare parts, fuels, and lubricants | 
                                    
                    
                        | 4682 | Street vendors of vehicle spare parts and fuels | 
                                    
                    
                        | 4690 | Retail trade exclusively through the internet, and printed catalogs, television and the like | 
                                    
                    
                        | 4699 | Retail trade, not specified | 
                                    
                    
                        | 4810 | Air transportation | 
                                    
                    
                        | 4820 | Rail transportation | 
                                    
                    
                        | 4830 | Water transportation | 
                                    
                    
                        | 4840 | Truck transportation | 
                                    
                    
                        | 4850 | Transit and ground passenger transportation | 
                                    
                    
                        | 4860 | Pipeline transportation | 
                                    
                    
                        | 4870 | Scenic and sightseeing transportation | 
                                    
                    
                        | 4881 | Support activities for transportation | 
                                    
                    
                        | 4882 | Repair and cleaning services for planes, ships, and trains | 
                                    
                    
                        | 4910 | Postal service | 
                                    
                    
                        | 4920 | Couriers and messengers | 
                                    
                    
                        | 4930 | Warehousing and storage | 
                                    
                    
                        | 5110 | Publishing industries (except internet) | 
                                    
                    
                        | 5120 | Motion picture and sound recording industries | 
                                    
                    
                        | 5150 | Broadcasting (except internet) | 
                                    
                    
                        | 5170 | Telecommunications | 
                                    
                    
                        | 5180 | Data processing, hosting, and related services | 
                                    
                    
                        | 5190 | Other information services | 
                                    
                    
                        | 5199 | Information, not specified | 
                                    
                    
                        | 5221 | Depository credit intermediation, private sector fund and trust management | 
                                    
                    
                        | 5222 | Other private credit intermediation and related activities | 
                                    
                    
                        | 5223 | Financial institutions for economic development, public sector fund and trust management | 
                                    
                    
                        | 5230 | Securities, commodity contracts, and other financial investments and related activities | 
                                    
                    
                        | 5240 | Insurance carriers and related activities | 
                                    
                    
                        | 5299 | Finance and insurance, not specified | 
                                    
                    
                        | 5310 | Real estate | 
                                    
                    
                        | 5321 | Automotive equipment rental and leasing | 
                                    
                    
                        | 5322 | Consumer goods rental, except automotive equipment | 
                                    
                    
                        | 5330 | Lessors of nonfinancial intangible assets (except copyrighted works) | 
                                    
                    
                        | 5411 | Professional, scientific, and technical services | 
                                    
                    
                        | 5412 | Scientific research and development services | 
                                    
                    
                        | 5413 | Veterinary services | 
                                    
                    
                        | 5414 | Photography services | 
                                    
                    
                        | 5510 | Management of companies and enterprises | 
                                    
                    
                        | 5611 | Administrative and support services | 
                                    
                    
                        | 5612 | Interior cleaning of planes, ships, and trains | 
                                    
                    
                        | 5613 | Cleaning, installation, and maintenance of green areas | 
                                    
                    
                        | 5614 | Investigation and security services | 
                                    
                    
                        | 5615 | Travel arrangement and reservation services | 
                                    
                    
                        | 5616 | Facilities support services | 
                                    
                    
                        | 5620 | Waste management and remediation services | 
                                    
                    
                        | 6111 | Elementary, secondary, and special needs private schools | 
                                    
                    
                        | 6112 | Elementary, secondary, and special needs public schools | 
                                    
                    
                        | 6121 | Junior private colleges | 
                                    
                    
                        | 6122 | Junior public colleges | 
                                    
                    
                        | 6131 | Colleges, universities, and professional private schools | 
                                    
                    
                        | 6132 | Colleges, universities, and professional public schools | 
                                    
                    
                        | 6141 | Other private schools and instruction | 
                                    
                    
                        | 6142 | Other public schools and instruction | 
                                    
                    
                        | 6150 | Educational support services | 
                                    
                    
                        | 6199 | Educational services, not specified | 
                                    
                    
                        | 6211 | Ambulatory health care private services | 
                                    
                    
                        | 6212 | Ambulatory health care public services | 
                                    
                    
                        | 6221 | Private hospitals | 
                                    
                    
                        | 6222 | Public hospitals | 
                                    
                    
                        | 6231 | Nursing and residential care private facilities | 
                                    
                    
                        | 6232 | Nursing and residential care public facilities | 
                                    
                    
                        | 6241 | Private social assistance | 
                                    
                    
                        | 6242 | Public social assistance | 
                                    
                    
                        | 6251 | Private child day care services | 
                                    
                    
                        | 6252 | Public child day care services | 
                                    
                    
                        | 6259 | Child day care services, unspecified private or public | 
                                    
                    
                        | 7111 | Performing arts companies | 
                                    
                    
                        | 7112 | Spectator sports | 
                                    
                    
                        | 7113 | Promoters of performing arts, sports, and similar events | 
                                    
                    
                        | 7114 | Independent artists, writers, and performers | 
                                    
                    
                        | 7115 | Street performers | 
                                    
                    
                        | 7120 | Museums, historical sites, and similar institutions | 
                                    
                    
                        | 7131 | Amusement parks and arcades | 
                                    
                    
                        | 7132 | Gambling industries | 
                                    
                    
                        | 7133 | Street vendors for gambling industries | 
                                    
                    
                        | 7210 | Accommodation | 
                                    
                    
                        | 7221 | Food services and drinking places | 
                                    
                    
                        | 7222 | Food services and drinking street vendors | 
                                    
                    
                        | 7223 | Drinking places (alcoholic beverages) | 
                                    
                    
                        | 8111 | Automotive repair and maintenance | 
                                    
                    
                        | 8112 | Equipment, machinery, personal and household goods repair and maintenance | 
                                    
                    
                        | 8119 | Repair and maintenance, not specified | 
                                    
                    
                        | 8121 | Personal and laundry services | 
                                    
                    
                        | 8122 | Parking lots and garages | 
                                    
                    
                        | 8123 | Street vendors for car care and cleaning | 
                                    
                    
                        | 8124 | Photofinishing and other personal services | 
                                    
                    
                        | 8125 | Death care services | 
                                    
                    
                        | 8130 | Associations and organizations | 
                                    
                    
                        | 8140 | Households with domestic employees | 
                                    
                    
                        | 9311 | Legislative bodies | 
                                    
                    
                        | 9312 | Federal public administration | 
                                    
                    
                        | 9313 | State public administration | 
                                    
                    
                        | 9314 | Municipal public administration | 
                                    
                    
                        | 9320 | International and extraterritorial bodies | 
                                    
                    
                        | 9700 | Works for a domestic unit or for another worker | 
                                    
                    
                        | 9999 | 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.