Year	current US$
1970	9845313.9780937
1971	58791611.6580694
1972	115464438.301249
1973	342395269.561461
1974	3185721066.6564
1975	6021459236.81517
1976	7191187045.65125
1977	8599773419.11448
1978	9141140606.41906
1979	18378940303.8567
1980	22365776071.0825
1981	21985710874.0065
1982	18805619937.9788
1983	16340782429.8028
1984	15779651054.6994
1985	17704502617.9256
1986	8996553024.90219
1987	10023111389.6195
1988	9034220409.15516
1989	13854080512.6864
1990	18663402052.7221
1991	11851879843.3308
1992	11557425353.3849
1993	10034513218.274
1994	8662370906.5973
1995	11127945855.598
1996	13304413544.5641
1997	11720965672.523
1998	6223338300.43276
1999	10362366106.1517
2000	21508133846.1883
2001	20743194360.6813
2002	17540100009.9999
2003	20180977926.2408
2004	52455828496.1855
2005	65001811864.1155
2006	76940158715.1458
2007	90325134535.6612
2008	195336529117.654
2009	85334180987.061
2010	150099446058.915
2011	236515585642.818
2012	168826476616.487
2013	139777007989.659
2014	123192638989.894
2015	60709950724.6356
2016	52363716523.3882
2017	71670043501.2879
2018	97428844976.9464
2019	78989180435.5692
2020	52719404402.9457
2021	121148953241.301