Year	current US$
1964	9500000
1965	8900000
1966	7800000
1967	7400000
1968	7600000
1969	10230000
1970	13400000
1971	13200000
1972	19000000
1973	23565000
1974	27370000
1975	35487000
1976	29614000
1977	41382000
1978	53994000
1979	71376000
1980	62584000
1981	67107000
1982	49774000
1983	51209021.919999994
1984	50331329.04
1985	64775000.00000001
1986	58656000
1987	75800426.84
1988	84651380.03
1989	94067547.93
1990	100090653.3
1991	99175475.97
1992	110672699.10000001
1993	103119302.89999999
1994	80452342.49000001
1995	143693321.8
1996	162872429.29999998
1997	143044010.39999998
1998	146461170.9
1999	161638851.10000002
2000	173446654
2001	142659182
2002	135232784
2003	166503653
2004	225514856
2005	641941584
2006	278609164
2007	270223476
2008	292526984
2009	233580723
2010	313778856
2011	352441670
2012	348169952
2013	369273220
2014	390775561
2015	372396635
2016	364478547
2017	357829167
2018	364566914
2019	392491880
2020	411437565