Year	current US$
1974	17569248.2
1975	20334753.04
1976	20225946.43
1977	21849588.39
1978	34011966.71
1979	45373851.78
1980	53417377.47
1981	47948074.34
1982	48370960.24
1983	43454410.55
1984	40738594.06
1985	48911220.55
1986	72848884.58
1987	65576049.79999999
1988	68931083.68
1989	56333957.67
1990	66479400.9390297
1991	65379469.3574812
1992	64901897.0413364
1993	61300472.790752
1994	46539591.9778455
1995	28640779.4919633
1996	33392471.6004184
1997	19975350.0050724
1998	20961035.3474556
1999	18520409.4140011
2000	11906371.4763465
2001	10338645.3421141
2002	6398897.74398471
2003	9061947.44592145
2004	24911914.5511134
2005	29323385.0712277
2006	29292207.8680014
2007	18036756.849228
2008	22392374.6013935
2009	25299099.2633187
2010	72250231.5192411
2011	111656559.039776
2012	90688150.3815644
2013	91514546.3109777
2014	147282876.830131
2015	101269765.473688
2016	109142182.179832
2017	169749529.425019
2018	184458102.938419
2019	178579848.554221
2020	395522247.26769
2021	194871095.261861
2022	563794037.168931