The Federal Statistical Agencies collect a wealth of economic, demographic and social data. These data are collected to meet specific or general requirements in legislation or the code of federal regulations. The agencies publish estimates from that data in various specific tabular forms in paper or on the Internet. Initial publication could be a press release followed by bulletins that present more detailed statistical data and analysis. Usually there still are many additional possible tabulations that characterize or analyze a segment of the population that are not published due to the lack of resources within the agency.