|
Year |
Population (in billions) |
Source |
|
0 |
0.30 |
Durand |
|
1000 |
0.31 |
Durand |
|
1250 |
0.40 |
Durand |
|
1500 |
0.50 |
Durand |
|
1750 |
0.79 |
D & C |
|
1800 |
0.98 |
D & C |
|
1850 |
1.26 |
D & C |
|
1900 |
1.65 |
D & C |
|
1910 |
1.75 |
Interp. |
|
1920 |
1.86 |
WPP63 |
|
1930 |
2.07 |
WPP63 |
|
1940 |
2.30 |
WPP63 |
|
1950 |
2.52 |
WPP98 |
|
1960 |
3.02 |
WPP98 |
|
1970 |
3.70 |
WPP98 |
|
1980 |
4.44 |
WPP98 |
|
1990 |
5.27 |
WPP98 |
|
1998 |
5.90 |
WPP98 |
|
2000 |
6.06 |
WPP98 |
|
2010 |
6.79 |
WPP98 |
|
2020 |
7.50 |
WPP98 |
|
2030 |
8.11 |
WPP98 |
|
2040 |
8.58 |
WPP98 |
|
2050 |
8.91 |
WPP98 |
Sources:
Durand:
J.D. Durand, 1974. Historical Estimates of World Population: An Evaluation (University of Pennsylvania, Population Studies Center, Philadelphia), mimeo.
D & C:
United Nations, 1973. The Determinants and Consequences of Population Trends, Vol.1 (United Nations, New York).
WPP63:
United Nations, 1966. World Population Prospects as Assessed in 1963 (United Nations, New York).
WPP98:
United Nations, (forthcoming). World Population Prospects: The 1998 Revision (United Nations, New York).