Year	current US$
1970	241751363.76686767
1971	385654585.06634974
1972	830408122.0325285
1973	1963811618.8381162
1974	3865708588.957055
1975	1415505308.690523
1976	2488267748.478702
1977	1844760695.8157032
1978	878409748.4001051
1979	4307491890.046099
1980	-611241019.5005132
1981	852448077.4042872
1982	-8319688741.185053
1983	-2742616033.7552743
1984	2857694386.533859
1985	3030391797.876236
1986	2441885570.3490467
1987	1376319758.6726997
1988	4470626472.739092
1989	3679054054.0540543
1990	-2386013027.082619
1991	-5649821070.088156
1992	-5990733846.281128
1993	-1048755910.394543
1994	703719976.5670768
1995	6259108131.740017
1996	762742940.9607627
1997	6014011266.791853
1998	3108190091.001011
1999	3349262973.6824393
2000	7559086930.173052
2001	-3549845041.3223143
2002	-1790607277.1299307
2003	4066804653.486546
2004	5221368178.324367
2005	9320019805.24839
2006	9375881523.272213
2007	8355832790.242993
2008	9372071227.741331
2009	-4776484996.93815
2010	335885566.87525165
2011	11494471792.554407
2012	6826336473.980928
2013	13304050976.632631
2014	8692486921.710121
2015	-451209121.87207156
2016	-171995618.51369143
2017	14086982842.690126
2018	12098369418.796436
2019	8063802775.248526
2020	-8436026885.171437
2021	2746681108.933707
2022	44825620198.34742
2023	22100014103.51355