Year	constant 2015 US$
1970	4622032752746.575
1971	4745222546536.641
1972	5003242746093.739
1973	5276627789138.957
1974	5046623725710.98
1975	5028799910376.961
1976	5281736387992.058
1977	5494782107663.025
1978	5777022725780.743
1979	5740017882084.352
1980	5610489375574.41
1981	5851242484112.959
1982	5919987009147.623
1983	6109520028568.948
1984	6604231430923.438
1985	6879555313262.233
1986	7120627469303.556
1987	7378497836854.491
1988	7805282533327.631
1989	7986144015827.897
1990	8092080312510.564
1991	8118529842876.617
1992	8400033458082.074
1993	8591448943722.542
1994	8975209546639.955
1995	9275997040504.738
1996	9678645832013.455
1997	10203065565645.357
1998	10806349934579.42
1999	11256605081984.44
2000	11686668711673.508
2001	11864559924949.623
2002	12039287298535.299
2003	12270773166486.043
2004	12742552881734.334
2005	13093330860477.617
2006	13585778269000.816
2007	13629299519890.15
2008	13263581189787.59
2009	13121058005933.44
2010	13687018587442.889
2011	13967469372377.072
2012	14505294886001.28
2013	14709964346374.268
2014	15202675511285.246
2015	15741217552602.7
2016	15907835863746.184
2017	16338552869237.576
2018	16813900078827.258
2019	17194326693317.086
2020	16604373846614.139
2021	17472215330668.271