Year	constant 2015 US$
1975	2168617848.309215
1976	2523834305.590093
1977	2865696142.3459053
1978	3098834873.2092066
1979	3271742513.1102295
1980	3477885798.4645653
1981	3582173451.034309
1982	3930029860.5343366
1983	4206352372.585642
1984	4389542013.848004
1985	4628974968.073599
1986	4727958348.937396
1987	5219791348.923286
1988	5741518698.104435
1989	6082928417.723278
1990	6750446948.410564
1991	7297768810.087586
1992	7722105288.066012
1993	7163956223.406708
1994	7611323324.76094
1995	9155598731.494793
1996	9549084417.749628
1997	9927235051.47064
1998	10785264321.15983
1999	11221746234.981684
2000	11861168468.452093
2001	12567564647.407116
2002	13004566192.817606
2003	13666701229.216576
2004	14371084399.623299
2005	14884702619.86196
2006	15570120010.318758
2007	16873883331.14768
2008	18195741942.410957
2009	17481743894.27627
2010	18163179736.984024
2011	18099917179.140266
2012	17612906891.87073
2013	16464062002.243929
2014	16193722550.52408
2015	16645887646.379402
2016	17342189189.848564
2017	18082379016.6776
2018	18957605928.494957
2019	19979566951.603817
2020	19403619285.61144
2021	20576758896.591763
2022	22059643962.36701
2023	22896198022.402916