Year	current US$
1978	71443354.89907944
1979	214697677.3886559
1980	445570929.00172955
1981	499320772.42906666
1982	848064395.1548678
1983	757831980.3345084
1984	888126795.1624185
1985	537480551.6760417
1986	339339777.78329515
1987	574344618.6608897
1988	118410010.70886679
1989	348868651.46215
1990	889367596.0775875
1991	478985369.33428675
1992	948372558.3754772
1993	569384345.8192779
1994	509717969.0046713
1995	-48705112.00585894
1996	-5316366.121968886
1997	215427853.56103885
1998	117443531.71694896
1999	416373209.3649016
2000	1167626334.3341868
2001	615980770.3053
2002	714513712.4436915
2003	1077099606.410451
2004	793783397.3755629
2005	2174423433.489726
2006	3390763996.305333
2007	2928897290.9345107
2008	5066808951.252732
2009	3907994265.080761
2010	7105959527.019066
2011	7841754428.854645
2012	10173729348.493916
2013	10389151612.323528
2014	10149176365.372847
2015	4917151134.052087
2016	2718571837.0703278
2019	5252336818.342894
2020	4162330013.975566
2021	5759862227.656474