Year	current US$
1975	14464342.3622399
1976	-68528591.286462
1977	-96763277.0217714
1978	-20329671.2136962
1979	-80363055.6115377
1980	-56413461.3279949
1981	-20046567.0108874
1982	-150561389.135924
1983	-120198610.539692
1984	-45725312.5254985
1985	66416094.2160986
1986	37225712.4098147
1987	73357159.2879048
1988	144500548.481229
1989	123591940.412603
1990	20206668.309374
1991	252514164.870828
1992	201281071.681772
1993	33584783.271054
1994	732013732.758272
1995	213656566.011032
1996	257841561.208482
1997	88459054.1839862
1998	229446031.196851
2012	2017737357.4025
2013	2090405816.44576
2014	1035805960.88633
2015	860158812.792629
2016	1321721690.56555
2017	1558521992.84483
2018	1874594080.08508
2019	2362958670.74022
2020	2414692841.83862
2021	3094412886.30202