Year	current US$
1975	182792808.785076
1976	30167405.6192849
1977	147711263.11433
1978	-27815375.1951291
1979	84141133.9871561
1980	-6468348.96937859
1981	-18786548.4745668
1982	16003539.4254283
1983	-70751232.88384
1984	-58040204.9723935
1985	-55286472.1805537
1986	-105251964.220521
1987	-42073792.5650414
1988	81640767.3697598
1989	152122467.574046
1990	109664471.982
1991	218123741.615414
1992	-101340980.404646
1993	235759189.277603
1994	560820004.963716
1995	553950539.337061
1996	637441488.14537
1997	88262783.2332426
1998	665981128.962997
1999	15267797.086164
2000	306352089.936856
2001	635226400.316583
2002	590890856.059747
2003	917808523.173145
2004	1228027772.18761
2005	1117901884.22781
2006	1826547432.09732
2007	-482317360.132071
2008	-1119190842.78647
2009	835612141.701923
2010	-1069468538.55263
2011	-1706737691.42605
2012	-1279152877.98546
2013	4426785305.47727
2014	5607278842.47938
2015	6302378652.59401
2016	5927378840.27608
2017	5099141193.49558
2018	8380161416.60826
2019	6895142702.82094
2020	13233383822.2625
2021	9300856435.82722