Year	current US$
1970	3466587.56121055
1971	6351644.23104413
1972	10349086.3626016
1973	15146514.5333148
1974	71926742.9668564
1975	97868434.399342
1976	125906377.338195
1977	152081161.198279
1978	186557332.116177
1979	350004490.79847
1980	471467558.021394
1981	352260281.180285
1982	227778658.702982
1983	294652240.855318
1984	309643717.37831
1985	325158526.101193
1986	184872752.466259
1987	182648857.866212
1988	134569675.753624
1989	203832952.350884
1990	318961670.530622
1991	168698128.428748
1992	157445180.006795
1993	174422024.589946
1994	155019536.362872
1995	206319438.672532
1996	220665496.679446
1997	159757600.150294
1998	33710229.0177061
1999	78445530.3253581
2000	191000988.666955
2001	198506104.815106
2002	188752096.88368
2003	218561746.482602
2004	252977835.214156
2005	266394259.534928
2006	380963059.242708
2007	429328904.351005
2008	675530131.527328
2009	426787252.637215
2010	403905928.050547
2011	610354432.72711
2012	541966135.160687
2013	463609478.981505
2014	364885108.055173
2015	200455942.279285
2016	148309038.924327
2017	212350853.14691
2018	352332775.920196
2019	321369357.864872
2020	173425977.932612
2021	562969039.910661