Country rankings using data from official sources

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Population size: The average for 2016 was 37.74 million. The highest value was in China: 1378.66 million and the lowest value was in Tuvalu: 0.01 million. Below is a chart for all countries where data are available for: Population size.
Population size, in millions, 2016
(million, Source: United Nations Population Division)
Definition: Total population is based on the de facto definition of population, which counts all residents regardless of legal status or citizenship. The values shown are midyear estimates.