Year	current US$
1970	19809999.531134937
1971	50760001.219809026
1972	-3090000.0203400883
1973	159999.9964237212
1974	-1860000.0347942123
1975	439999.9938905238
1976	10439999.883994479
1977	-1160000.0578910152
1978	-1340000.0631809281
1979	680000.0369548822
1980	5809999.952092762
1981	3949999.9955296526
1982	14080000.020563599
1983	19610000.342130646
1984	16030000.45754016
1985	18540000.09037549
1986	51109999.679029025
1987	135090002.633631
1988	120960001.04024972
1989	152950001.41672823
1990	72780002.11715698
1991	80220002.00301409
1992	294079995.83520025
1993	340739993.9261377
1994	208169991.3460761
1995	33109999.293461442
1996	20709999.63395297
1997	-2050000.2074986743
1998	12429999.686777553
1999	-3400000.376626853
2000	-17059999.536722872
2001	-17630000.151693832
2002	-30979999.70242385
2003	-25099999.722093333
2004	-38860000.19870697
2005	-17489999.56622718
2006	-44260000.586509675
2007	28150000.471621666
2008	-19540000.56907543
2009	-40410000.49002477
2010	-38989998.96831814
2011	-34400000.41760501
2012	-13050000.062212352
2013	8870000.746101145
2014	5690000.03300605
2015	-149999.77685513394
2016	-4439999.813213969
2017	2109999.757260107
2018	17319999.36327331
2019	11199999.552220125
2020	22190001.53802338
2021	-6769999.992102427
2022	-13950000.990182115