Year	current US$
1970	27125765.0939105
1971	24573410.2462006
1972	28774063.6640299
1973	37862756.9584204
1974	42790706.325352
1975	53191537.340377
1976	42594438.8634058
1977	70415336.496056
1978	89005209.615613
1979	78272698.9836368
1980	96280040.4278189
1981	97668404.439366
1982	228567227.72537
1983	154858134.136911
1984	157003488.007093
1985	57369621.8604421
1986	164466479.283041
1987	168932107.251888
1988	172518765.190571
1989	176695091.004421
1990	180559120.719284
1991	185564981.709748
1992	161326716.702373
1993	120974048.443122
1994	132432004.795414
1995	197332662.787941
1996	204729340.317544
1997	207208455.424631
1998	288319446.397024
1999	140730766.484045
2000	124083709.234212
2001	143405177.713176
2002	157081689.873857
2003	218035385.632584
2004	207714965.141554
2005	205784467.902734
2006	252640427.290981
2007	235024858.043334
2008	413891009.717913
2009	404890024.07295
2010	485817358.446183
2011	553835507.280117
2012	635189088.857712
2013	531613988.714988
2014	838960783.740739
2015	758301489.952558
2016	585978734.942432
2017	730548067.650799
2018	386224708.467256
2019	515949001.673914
2020	465790956.9695
2021	434775271.74262