Year	current US$
1970	107056358.237923
1971	86152343.4052811
1972	86508642.8465655
1973	163951686.765433
1974	462264277.860355
1975	181273921.998878
1976	186049484.587368
1977	215904991.551424
1978	171558595.719385
1979	1348958268.26846
1980	4860473436.96368
1981	2873602004.81621
1982	1935898305.24277
1983	2580415562.5337
1984	371976322.891241
1985	1373114721.02265
1986	1455473016.81668
1987	1992787503.50395
1988	1880963607.50284
1989	1347489168.35387
1990	1195821471.2735
1991	1524978303.19205
1992	1148725462.71655
1993	1378321481.89276
1994	1756714833.79742
1995	585115830.022993
1996	1077639593.55378
1997	666438734.408925
1998	510255833.387155
1999	317334701.970583
2000	508927281.145097
2001	703753940.507656
2002	858931713.381231
2003	241396038.628576
2004	537057732.404416
2005	1431146787.96973
2006	2223977341.47437
2007	3338745132.30503
2008	4883497622.76514
2009	2574092181.458
2010	5805069584.59577
2011	6778322070.6613
2012	5054579231.17622
2013	5271786080.17542
2014	3413959254.96564
2015	816644894.340794
2016	1558940485.86654
2017	1342222481.57419
2018	1031336066.2979
2019	2636746862.17803
2020	3403368361.94288
2021	10907029645.3699