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Your numbers are off, and you omitted emigration numbers. https://www.census.gov/popclock/ says > The United States population on January 1, 2019 was: 329,474,910 > The United States population on December 31, 2019 was: 331,163,242 Difference = 1,688,332 (Your given population numbers correspond to roughly October 4, 2017 and May 4, 2018.) Your 1.03M appears correct - https://www.dhs.gov/immigration-statistics/yearbook/2019/tab... . It's the 3rd smallest number of the most recent 15 years. Smaller also than 1906, 1907, 1910, 1913 and 1914. However, people do move away from the US. https://www.census.gov/library/stories/2019/12/net-internati... comments "Net international migration added 595,000 to the U.S. population between 2018 and 2019, the lowest level this decade." Thus, it does not appear true that "The American population increase is entirely driven by immigration". |
And the 3 largest were 1.27M, 1.18M, and 1.13M. For the last 20 years legal immigration was at an average of 1.06M/year, and the year-to-year differences were negligible (except for 2003) (yes, including during the notoriously anti-immigrant Trump presidency, that averaged 1.08M legal immigrants/year). So ranking them in terms of Nth smallest/largest makes little sense - you're studying noise.