From the website: "The Bureau of Economic Analysis (BEA) produces economic accounts statistics that enable government and business decision-makers, researchers, and the American public to follow and understand the performance of the Nation's economy. To do this, BEA collects source data, conducts research and analysis, develops and implements estimation methodologies, and disseminates statistics to the public."
To find in-depth industry analysis from the BEA, see their page on Industries (https://www.bea.gov/resources/learning-center/what-to-know-industries) for links to historical analysis of GDP by industry, gross output by industry, input-output accounts, and more.
