The world population is the population of humans on the planet Earth. It is currently estimated to be 6,870,100,000 by the United States Census Bureau. The world population has experienced continuous growth since the end of the Black Death around the year 1400; the highest rates of growth increases above 1.8% per year were seen briefly during the 1950s, then for a longer period during the 1960s and 1970s. The growth rate peaked at 2.2% in 1963, and declined to 1.10% by 2009. Annual births have reduced to 140 million since their peak at 173 million in the late 1990s, and are expected to remain constant, while deaths number 57 million per year and are expected to increase to 90 million per year by 2050. Current projections show a steady decline in the population growth rate, with the population expected to reach between 8 and 10.5 billion between the year 2040 and 2050.

Wiki Article on World Population (external link)