Year	current US$
1976	-157981762.900107
1977	-59184380.3277087
1978	20982105.6210522
1979	31640541.24696
1980	-96482198.9815791
1981	-124067965.293991
1982	-157475650.807034
1983	2971661.7088536
1984	-49641023.246418
1985	-38706864.3450337
1986	78881102.1364986
1987	166604165.994234
1988	544677262.592959
1989	517621791.000519
1990	478745427.793002
1991	401841838.734695
1992	644109421.053057
1993	1453010058.82267
1994	1006908739.09743
1995	1066953147.90319
1996	1164808397.87071
1997	1238078192.89326
1998	981397272.538915
1999	924038308.660891
2000	793683653.821803
2001	888723956.851943
2002	824894139.513057
2003	965385045.529433
2004	1344114298.24763
2005	832775587.595765
2006	1153102008.78168
2007	973665408.331615
2008	-234133259.062702
2009	592751278.914009
2010	706499743.21975
2011	102832704.582147
2012	471675645.138581
2013	577692340.952436
2014	874746921.108527
2015	1473916431.80668
2016	1893050522.35093
2017	2093925076.4234
2018	2344222972.37168
2019	2420856927.70164
2020	2783477858.7996
2021	4082264554.00859