Year	current US$
1974	45515400.4014139
1975	68418496.1514999
1976	141364147.042912
1977	128742831.23081
1978	97743338.8975028
1979	-1026545.95119097
1980	1893271450.68266
1981	1331588162.98198
1982	966181287.417181
1983	997547099.099687
1984	900609327.587044
1985	581746788.279872
1986	805988282.556511
1987	721762574.262816
1988	462827398.191549
1989	1247910859.76287
1990	1176397227.68406
1991	766741661.458387
1992	1105395811.1676
1993	1202387832.25752
1994	793686026.033312
1995	-65852649.1070207
1996	80054601.2859495
1997	-27879685.7904822
1998	-24512401.7854631
1999	23571654.7190644
2000	4679986.18745577
2001	357728169.433767
2002	-164915472.663446
2003	155444235.636425
2004	448914779.355845
2005	169054474.564911
2006	479629827.160868
2007	944872849.174229
2008	1649132923.31814
2009	641017701.659912
2010	497660581.314512
2011	487980814.318789
2012	167716512.631953
2013	-212373672.717158
2014	651228386.825268
2015	513304587.18081
2016	959517537.733701
2017	1048800943.30442
2018	1581068999.07907
2019	1340354490.86137
2020	238969151.260268
2021	385405131.941937