Immigration to the United States: foreign-born population evolution (1850 - 2010)

Source: US Department of Homeland Security, Office of Immigration Statistics

Reference 1: Number of foreign-born and Percent foreign-born.

Reference 2: 1850, 1860, 1870, 1880, 1890, 1900, 1910, 1920, 1930, 1940, 1950, 1960, 1970, 1980, 1990, 2000 and 2010[71].

Source: http://en.wikipedia.org/wiki/Immigration_to_the_United_States