1760 - Industrial Revolution
1804 - 1 billion
1850 - 1.2 billion
1900 - 1.6 billion
1927 - 2 billion
1950 - 2.55 billion
1955 - 2.8 billion
1960 - 3 billion
1965 - 3.3 billion
1970 - 3.7 billion
1975 - 4 billion
1980 - 4.5 billion
1985 - 4.85 billion
1990 - 5.3 billion
1995 - 5.7 billion
1999 - 6 billion
2006 - 6.5 billion
2009 - 6.8 billion
2011 - 7 billion
2025 - 8 billion (Estimated)
1804 - 1 billion
1850 - 1.2 billion
1900 - 1.6 billion
1927 - 2 billion
1950 - 2.55 billion
1955 - 2.8 billion
1960 - 3 billion
1965 - 3.3 billion
1970 - 3.7 billion
1975 - 4 billion
1980 - 4.5 billion
1985 - 4.85 billion
1990 - 5.3 billion
1995 - 5.7 billion
1999 - 6 billion
2006 - 6.5 billion
2009 - 6.8 billion
2011 - 7 billion
2025 - 8 billion (Estimated)