Population, long-run history: compare countries

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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	Nigeria	Sierra Leone
Dec 31, 1999	121,649	3,736
Dec 31, 2000	125,014	3,809
Dec 31, 2001	128,513	4,043
Dec 31, 2002	132,165	4,287
Dec 31, 2003	135,971	4,466
Dec 31, 2004	139,900	4,602
Dec 31, 2005	143,914	4,708
Dec 31, 2006	148,019	4,818
Dec 31, 2007	152,195	4,918
Dec 31, 2008	156,434	5,023
Dec 31, 2009	160,751	5,132
Dec 31, 2010	165,142	5,246
Dec 31, 2011	169,607	5,364
Dec 31, 2012	174,142	5,486
Dec 31, 2013	178,737	5,613
Dec 31, 2014	183,362	5,744
Dec 31, 2015	187,979	5,879
Dec 31, 2016	192,594	6,019
Dec 31, 2017	197,417	6,163
Dec 31, 2018	202,498	6,312
Dec 31, 2019	207,699	6,461
Dec 31, 2020	213,021	6,611
Dec 31, 2021	218,473	6,761
Dec 31, 2022	223,735	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

Nigeria

1885-1950: Broadberry, S., & Gardner, L. (2022). Economic growth in Sub-Saharan Africa, 1885–2008: Evidence from eight countries. Explorations in Economic History, 83, 101424.

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