Year	current US$
1970	995781.859112655
1971	3985822.49951821
1972	7122921.36903599
1973	14981085.241035
1974	101536950.465251
1975	103997876.314603
1976	119959676.958566
1977	125564237.181472
1978	133723371.301996
1979	320526288.659087
1980	395871506.755546
1981	307682145.084079
1982	190525919.340398
1983	245252886.192773
1984	252476555.406785
1985	262313205.796064
1986	110314894.342493
1987	164841591.13916
1988	123739131.875412
1989	172926931.000398
1990	220441499.06308
1991	104093838.149806
1992	98491331.3915944
1993	99789535.0936996
1994	98647400.0482272
1995	103949535.141225
1996	115225185.769
1997	110098915.255118
1998	24456477.8321356
1999	59381157.4231836
2000	140622406.445603
2001	144686237.953971
2002	124960792.112593
2003	138854777.502797
2004	169506473.85623
2005	206011434.611478
2006	302380553.16938
2007	358465062.781751
2008	508204601.296187
2009	298175818.937353
2010	352038273.504761
2011	532754314.430548
2012	456441874.529112
2013	378770476.248443
2014	278511775.311116
2015	181827933.66206
2016	117586789.210946
2017	166496351.924475
2018	248129915.84982
2019	176461768.27655
2020	77256776.0443407
2021	218009307.281405