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  2. 1940 United States census - Wikipedia

    en.wikipedia.org/wiki/1940_United_States_census

    A number of new questions were asked including where people were five years before, highest educational grade achieved, and information about wages. This census introduced sampling techniques; one in 20 people were asked additional questions on the census form. Other innovations included a field test of the census in 1939.

  3. United States census - Wikipedia

    en.wikipedia.org/wiki/United_States_census

    The United States census (plural censuses or census) is a census that is legally mandated by the Constitution of the United States. It takes place every ten years. The first census after the American Revolution was taken in 1790 under Secretary of State Thomas Jefferson. There have been 24 federal censuses since that time. [1]

  4. State censuses in the United States - Wikipedia

    en.wikipedia.org/wiki/State_censuses_in_the...

    The 1855 to 1875 New York state censuses asked the person for the name of the county that one was born in if one was born in New York State. [15] Also, the 1865 New York state census asked many questions about military service. [15]

  5. List of countries by population in 1939 - Wikipedia

    en.wikipedia.org/wiki/List_of_countries_by...

    Population distribution by country in 1939. This is a list of countries by population in 1939 (including any dependent, occupied or colonized territories for empires), providing an approximate overview of the world population before World War II.

  6. List of wars involving the United States - Wikipedia

    en.wikipedia.org/wiki/List_of_wars_involving_the...

    This is a list of military conflicts, that United States has been involved in. There are currently 123 military conflicts on this list, 5 of which are ongoing. [citation needed] These include major conflicts like the American Revolutionary War, the War of 1812, the Mexican–American War, the American Civil War, the Spanish-American War, World War I, World War II and the Gulf War.

  7. Demographic history of the United States - Wikipedia

    en.wikipedia.org/wiki/Demographic_history_of_the...

    After World War II, the US experienced a shift away from the cities and into suburbs mostly due to the cost of land, the availability of low-cost government home loans, fair housing policies, and the construction of highways. [35] Many of the original manufacturing cities lost as much as half their populations between 1950 and 1980.

  8. Population and housing censuses by country - Wikipedia

    en.wikipedia.org/wiki/Population_and_housing...

    At that point there were 797,584 citizens in the kingdom. Georg Christian Oeder took a statistical census in 1771 which covered Copenhagen, Sjælland, Møn, and Bornholm. After that, censuses followed somewhat regularly in 1787, 1801, and 1834, and between 1840 and 1860, the censuses were taken every five years, and then every ten years until 1890.

  9. 1930 United States census - Wikipedia

    en.wikipedia.org/wiki/1930_United_States_census

    The original census enumeration sheets were microfilmed by the Census Bureau in 1949, after which the original sheets were destroyed. [2] The microfilmed census is located on 2,667 rolls of microfilm, and available from the National Archives and Records Administration. Several organizations also host images of the microfilmed census online, and ...