Year	current US$
1960	408800000
1961	354300000
1962	347200000
1963	316600000
1964	411900000
1965	307700000
1966	425900000
1967	359700000
1968	364900000
1969	428202000
1970	388876000
1971	330047000
1972	334714000
1973	422406000
1974	705141000
1975	744887000
1976	535895999.99999994
1977	638162000
1978	940947000
1979	1449031000
1980	2028666000
1981	1905646000
1982	1773139000
1983	1794825000
1984	1845586000
1985	1831800000
1986	1829419000
1987	2056362000
1988	2278759246
1989	2087411553.9999998
1990	2634472172
1991	3061116952
1992	3472800000
1993	4005408077
1994	4232000000
1995	4481000000
1996	4740000000
1997	5282000000
1998	6263364070
1999	6255217790
2000	6526366355
2001	5564619683
2002	5851950137
2003	6470566031
2004	7788845443
2005	8621025256
2006	10010233666
2007	9730696837
2008	11840322679
2009	8047402507
2010	10501870306
2011	17143796822
2012	15843763193
2013	17906559345
2014	19211981410
2015	15124493927
2016	19238593512
2017	20747954200
2018	21937528368
2019	19982531475
2020	16011954898