Year	constant 2015 US$
1970	1350445675.862981
1971	1501442674.5988433
1972	1570368136.4859655
1973	1780202230.3401592
1974	1710375729.3825111
1975	1811502584.7529824
1976	1515675779.9811206
1977	1322918877.6322913
1978	1172358729.7167912
1979	1166273370.818678
1980	1714337569.987283
1981	2751292252.5323052
1982	4197008236.7966914
1983	3624827170.4588294
1984	3601722543.708953
1985	2954885020.3443832
1986	2328034009.404585
1987	2000907496.5757914
1988	1344692735.6120896
1989	1024436955.1553141
1990	1072293832.8242885
1991	1666682573.93298
1992	1777670330.9559581
1993	1279349681.099806
1994	1494161558.074488
1995	133855817.58205247
1996	179875387.22315872
1997	614094273.8882905
1998	1019478741.5851086
1999	822372722.2406613
2000	37698560.240917504
2001	600018154.4168779
2002	843925130.751702
2003	1659115788.653304
2004	1189268577.0717587
2005	1683245249.5957193
2006	2173336223.2647295
2007	2379643053.807003
2008	2904411205.170507
2009	3657074513.115969
2010	5055198196.04532
2011	3730437416.149443
2012	6200120007.84737
2013	7850128713.357443
2014	8865297362.217854
2015	7462515048.91931
2016	5962324647.257725
2017	4146483262.1855536
2018	4692558961.215278
2019	4125433737.5198007
2020	3367384806.21391
2021	4568413331.813557