One of the major elements of the U.S. national and industry economic accounts produced by the Bureau of Economic Analysis. They provide detailed statistics on economic processes and relationships, and they provide essential information for other economic accounts. They provide Commodity detail on the composition of the final-use categories. In addition, they provide information on what Industries use to produce their Output and on which Commodities are produced by each Industry. The benchmark I-O accounts consist of make tables, use tables, and direct and total requirements tables. They are prepared at about 5-year intervals, primarily from Economic Census data. For information on the newest data, visit BEA Benchmark & The New 546 Industry Scheme.