Year	current US$
1970	1667655426.60532
1971	1744091423.90676
1972	1520787577.08248
1973	1643170738.24484
1974	2037081656.03082
1975	2217265482.95028
1976	2391589346.14087
1977	2767233660.42934
1978	3098485434.01186
1979	3466883157.52104
1980	3395346424.33123
1981	3258708829.42286
2009	11080132310.4451
2010	14289975733.7475
2011	16630409946.3194
2012	18511801827.4972
2013	18890016968.3984
2014	18885765415.8654
2015	18572571195.5786
2016	16826000216.6437
2017	17751891426.8509
2018	17143221811.4464
2019	17731939790.9716
2020	18585819842.831
2021	13621070038.579