Year	current US$
1970	93932786.9592462
1971	79219575.8575791
1972	309160868.025894
1973	350044638.456857
1974	312869135.008412
1975	643135159.399624
1976	558728938.56029
1977	533446990.39532
1978	608799852.718825
1979	882477351.993553
1980	312451447.942538
1981	440790699.618247
1982	207456757.514884
1983	66872805.4784174
1984	-738139308.34418
1985	462496382.369399
1986	760981634.348566
1987	705652041.358147
1988	922204752.889993
1989	965004915.267726
1990	841185974.187103
1991	911981984.199168
1992	949683579.755805
1993	1512704941.76338
1994	2157980322.74397
1995	2316084111.67189
1996	2879848962.52468
1997	3556102202.55622
1998	4969448188.39039
1999	4763267926.84934
2000	4765457661.50762
2001	5243258024.61376
2002	5496619870.58797
2003	3924014068.37595
2004	4338853001.09683
2005	6235722859.74127
2006	7053090430.91839
2007	8188002808.97726
2008	7740333242.82554
2009	6812899604.96798
2010	7665664066.32072
2011	7494401473.87702
2012	8126032527.38583
2013	8654203393.63114
2014	10102291767.1298
2015	12077154140.9631
2016	13227235394.9176
2017	13787741055.8989
2018	15963119215.8435
2019	16573400447.5764
2020	13127908497.8722
2021	19861497346.962