Year	current US$
1965	935199625.9201497
1966	988399604.6401582
1967	758799696.4801214
1968	949199620.3201519
1969	957599616.9601532
1970	1025919589.6321642
1971	1850333335.205477
1972	2133461418.0313666
1973	2691757819.349096
1974	9250181647.001034
1975	6547553718.210404
1976	5959224931.340997
1977	4040954265.3350363
1978	4755447132.007286
1979	12165027897.787716
1980	12615751562.170502
1981	7773015406.137346
1982	461948310.4153715
1983	2040607320.646226
1984	3357405205.666381
1985	2344116933.164424
1986	-326914778.29969543
1987	3448610687.461199
1988	956889068.8781452
1989	2682288386.8486176
1990	-2420138888.888889
1991	-11979850423.3666
1992	-2730061349.6932516
1993	834437748.3443708
1994	2117844781.1447814
1995	2824612662.842438
1996	4124792507.907244
1997	4025066837.2073092
1998	-1876911365.1576998
1999	1957853588.0294993
2000	9929845608.178593
2001	5500811915.925942
2002	3053495396.724073
2003	8439257479.564581
2004	14584323040.380047
2005	28852739726.027397
2006	42022772386.413765
2007	40233767513.211876
2008	60183463032.124626
2009	31850165922.47685
2010	41918027124.25028
2011	72889603919.13878
2012	84329989711.93416
2013	76836548667.26143
2014	60140494154.2765
2015	10121255633.999441
2016	-979688022.3210001
2017	5494402505.356842
2018	16412285564.784273
2019	11445453886.716885