Year	current US$
1975	-40322756.299193114
1976	-79796386.86495659
1977	-56991728.12437712
1978	-56831402.57544872
1979	-71794361.85551634
1980	-16457017.849152291
1981	-87953065.18172327
1982	-26102520.75771889
1983	12032019.092129469
1984	54342962.26321285
1985	92030030.32864317
1986	2585392.532193109
1987	1044100.8303087556
1988	52354198.77691046
1989	29135385.074330036
1990	-4872470.541440859
1991	-17252523.243673246
1992	132000000
1993	92576940.28737633
1994	152538159.39939344
1995	40471336.94625367
1996	60657286.332222946
1997	-69159250.23616567
1998	-91781434.89285538
1999	-142246308.35777855
2000	-125650000
2001	-134950000
2002	-170850000
2003	-134000000
2004	-298750000
2005	-305050000
2006	-193150000
2007	-172250000
2008	-343150000
2009	-140300000
2010	-410950000
2011	-499700000
2012	-398800000
2013	-483950000
2014	-457100000
2015	-342077900
2016	-269417550
2017	-246104200
2018	69686600.00000024
2019	165949250.00000024
2020	-302921850
2021	-465509050
2022	-461188000