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Population, long-run history by country

Annual, Persons, thousands

Source: Maddison Project Database 2023

Population, long-run history: latest observations by country
Date	United Kingdom	United States	Sierra Leone
Dec 31, 1999	58,946	279,040	3,736
Dec 31, 2000	59,149	282,162	3,809
Dec 31, 2001	59,377	284,969	4,043
Dec 31, 2002	59,631	287,625	4,287
Dec 31, 2003	59,903	290,108	4,466
Dec 31, 2004	60,217	292,805	4,602
Dec 31, 2005	60,682	295,517	4,708
Dec 31, 2006	61,098	298,380	4,818
Dec 31, 2007	61,593	301,231	4,918
Dec 31, 2008	62,100	304,094	5,023
Dec 31, 2009	62,539	306,772	5,132
Dec 31, 2010	63,040	309,327	5,246
Dec 31, 2011	63,567	311,583	5,364
Dec 31, 2012	63,989	313,878	5,486
Dec 31, 2013	64,392	316,060	5,613
Dec 31, 2014	64,885	318,386	5,744
Dec 31, 2015	65,400	320,739	5,879
Dec 31, 2016	65,941	323,072	6,019
Dec 31, 2017	66,335	325,122	6,163
Dec 31, 2018	66,732	326,838	6,312
Dec 31, 2019	67,095	328,330	6,461
Dec 31, 2020	67,380	331,512	6,611
Dec 31, 2021	67,651	332,032	6,761
Dec 31, 2022	68,093	333,288	6,910

Source: Bolt, J. and van Zanden, J.L. (2024), Maddison style estimates of the evolution of the world economy: A new 2023 update, Journal of Economic Surveys, 1-41, DOI 10.1111/joes.12618. Licensed under CC BY 4.0. The original sources are listed on each page.

All data sources

Original sources of these estimates

GDP pc: 2008 - 2022: Total Economy Database the Conference Board for all countries included in TED. Otherwise UN national accounts statistics

United Kingdom

1: Scheidel, W. and Friesen, S. J., ‘The size of the economy and the distribution of income in the Roman Empire’, Journal of Roman Studies, 99 (2009), pp. 61–91
1252–1700 (England): Broadberry, S.N., B. Campbell, A. Klein, M. Overton and B. van Leeuwen (2015), British Economic Growth 1270-1870 Cambridge: Cambridge University Press.
1700–1870: Broadberry, S.N., B. Campbell, A. Klein, M. Overton and B. van Leeuwen (2015), British Economic Growth 1270-1870 Cambridge: Cambridge University Press.
1870-1950: C.H. Feinstein, National Income Expenditure and Output of the United Kingdom 1855-1965, Cambridge, 1972

United States

1650 - 1790: McCusker, John J., ‘Colonial Statistics’, Historical Statistics of the United States: Earliest Time to the Present, in S. B. Carter, S. S. Gartner, M. R. Haineset al. New York, Cambridge University Press. V-671.
1790 - 1870: Sutch, R. (2006). National Income and Product. Historical Statistics of the United States: Earliest Time to the Present, in S. B. Carter, S. S. Gartner, M. R. Haineset al. New York, Cambridge University Press III-23-25.
1800-1830: Prados de la Escosura, L. (2009). “Lost Decades? Economic Performance in Post-Independence Latin America,” Journal of Latin America Studies 41: 279–307. (updated data)
1820-1950: GDP movement from Maddison (1995a), amended for 1820–70 to include income of the indigenous population (taken to be $400 per capita in 1820 and 1870).

No separate list is published for Sierra Leone; the database as a whole is cited above.