<Tr> <Th_colspan="2"> Website </Th> </Tr> <Tr> <Td_colspan="2"> census.gov </Td> </Tr> <P> The United States Census is a decennial census mandated by Article I, Section 2 of the United States Constitution, which states: "Representatives and direct Taxes shall be apportioned among the several States...according to their respective Numbers...The actual Enumeration shall be made within three Years after the first Meeting of the Congress of the United States, and within every subsequent Term of ten Years ." The United States Census Bureau (officially the Bureau of the Census, as defined in Title 13 U.S.C. § 11) is responsible for the United States Census . </P> <P> The first census after the American Revolution was taken in 1790, under Secretary of State Thomas Jefferson; there have been 22 federal censuses since that time . The current national census was held in 2010; the next census is scheduled for 2020 and will be largely conducted using the Internet . For years between the decennial censuses, the Census Bureau issues estimates made using surveys and statistical models, in particular, the American Community Survey . </P>

How often does the united states attempt to count every person in the country