The global population is still increasing, but there is significant uncertainty about its long-term trajectory due to changing rates of fertility and mortality. The growth rate declined to 1.2% between 20 and is projected to decline further in the course of the 21st century. The highest global population growth rates, with increases of over 1.8% per year, occurred between 19 – peaking at 2.1% between 19. The human population has experienced continuous growth following the Great Famine of 1315–1317 and the end of the Black Death in 1350, when it was near 370,000,000. It took over two million years of human prehistory and history for the human population to reach one billion and only 200 years more to grow to 7 billion. In demographics, the term world population is often used to refer to the total number of humans currently living, and was estimated to have exceeded 7.9 billion as of November 2021. High, medium, and low projections of the future human world population
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