7
World
population growth.
Year
Population (millions)
25000 BCE
1
5000 BCE
5
1 CE
170
1000 CE
265
1400 CE
350
1800 CE
900
1900 CE
1625
2000 CE
6272
Source: Michael Kremer
(1993), “Population Growth and Technical Change, One Million B.C. to 1990,” Quarterly
Journal of Economics 108:3 (August), pp. 681-716.