Year	current US$
1970	29329999.14884567
1971	30089999.474585034
1972	36980000.287294365
1973	38320000.5609542
1974	66320001.03965406
1975	73109998.68810183
1976	133039996.82329573
1977	125869997.65038496
1978	123490000.23305416
1979	186240002.2149086
1980	211919995.44203272
1981	193030003.13788658
1982	192570003.31953168
1983	94699998.99528916
1984	107439999.79831284
1985	87519999.67917797
1986	99670000.54381791
1987	137039998.54624274
1988	169559998.87175852
1989	222459997.21623963
1990	263229999.68566006
1991	162900002.36965713
1992	268890005.14894736
1993	273709993.8802421
1994	248499998.87123704
1995	340100001.78776675
1996	341670003.66188586
1997	297289998.3581156
1998	294780007.02522683
1999	139529998.11619523
2000	129660001.38036917
2001	253449998.3768912
2002	210530000.30107784
2003	169269999.2842972
2004	253860001.27531582
2005	238379998.86274326
2006	160870000.15936792
2007	260479997.67959088
2008	214170000.62018633
2009	256540005.82918477
2010	219730004.37766314
2011	181419999.5584786
2012	90279997.21094973
2013	55130000.04924835
2014	17669999.666512
2015	10349999.694153655
2016	9569999.977946285
2017	5250000.005587929
2018	22420000.61459839
2019	12989999.992772931
2020	8449999.924749138
2021	10290000.004693871
2022	5689999.913796779