Year	current US$
1975	4799785301.39687
1976	4477229145.36726
1977	3865643299.17303
1978	4343672673.34147
1979	5241813183.8
1980	9435035820.78103
1981	9798311445.66535
1982	8391724095.92901
1983	8539193870.44177
1984	10369296761.5455
1985	10457848110.9232
1986	7439590974.14841
1987	8121916149.29494
1988	7313226519.26022
1989	8447983692.42647
1990	9975258419.56356
1991	8955998979.72253
1992	8783812245.67657
1993	8149312692.2302
1994	10214965413.6005
1995	15429441516.7964
1996	20862446256.3256
1997	24003037893.5026
1998	16836189485.96
1999	21550743410.4485
2000	36776984209.1481
2001	36683808342.2966
2002	33346263116.3363
2003	37169091459.6677
2004	51463699416.8329
2005	77302298057.1289
2006	92872482896.8284
2007	102200706672.064
2008	128563776376.831
2009	74162022693.5616
2010	88483928228.2321
2011	114305849615.396
2012	119875040895.508
2013	117407322016.76
2014	110053727570.61
2015	68484653237.7766
2016	52343048830.777
2017	62220075048.8918
2018	81762545600.7525
2019	58728161559.4753
2020	39250012222.5989
2021	108222915618.912