Timeline - Chronology of Population

1700
Population growth increased significantly as the Industrial Revolution gathered pace from 1700 onwards.

1950, 1959, 1980, 1989
In the period from the 1950s to the 1980s, concerns about global population growth and its effects on poverty, environmental degradation, and political stability led to efforts to reduce population growth rates.

1960, 1969
The last 50 years have seen a yet more rapid increase in the rate of population growth due to medical advances and substantial increases in agricultural productivity, particularly beginning in the 1960s, made by the Green Revolution.

1978, 1987
In the 1978s, tension grew between population control advocates and women's health activists who advanced women's reproductive rights as part of a human rights-based approach.

1980, 1989
Growing opposition to the narrow population control focus led to a significant change in population control policies in the early 1980s.

1987, 1993
This was about 12 years after World population reached 5 billion in 1987, and 6 years after world population reached 5.5 billion in 1993.

Population in years

Population in years

12 October 1999
The United Nations Population Fund designated 12 October 1999 as the approximate day on which world population reached 6 billion.

24 February 2006
According to papers published by the United States Census Bureau, the world population hit 6.5 billion on 24 February 2006.

October 2011
According to a separate estimate by the United Nations, Earth’s population exceeded seven billion in October 2011, a milestone that offers unprecedented challenges and opportunities to all of humanity, according to UNFPA, the United Nations Population Fund.

12 March 2012
The US Census Bureau estimates the 7 billion number was surpassed on 12 March 2012.

2055
In 2007 the United Nations Population Division projected that the world's population will likely surpass 10 billion in 2055.

Population in decades

Population in decades

Population in centuries

Population in centuries