Year	current US$
1960	41200000
1961	1200000
1962	43300000
1963	50800000
1964	84346000
1965	87423000
1966	79460000
1967	85835000
1968	91417000
1969	110992000
1970	131335000
1971	160558000
1972	203115000
1973	274216000
1974	344644000
1975	370338000
1976	319742000
1977	381164000
1978	448451000
1979	635756000
1980	815047000
1981	888900000
1982	724624000
1983	705538021.92
1984	672307517.15
1985	684093859.44
1986	656999098.39
1987	639908391.0400001
1988	784468362.48
1989	1170386648.0200002
1990	1306522712.4699998
1991	1041097822.3600001
1992	1094052102.9099998
1993	1208988329.89
1994	1284240175.59
1995	1419205851.92
1996	1564919530.6
1997	1541545377.4300003
1998	1311141846.5700002
1999	1599275299.69
2000	1470442899
2001	1566333284
2002	2181813909
2003	2068672647
2004	2483908794
2005	3736530666
2006	3357044502
2007	4500659971
2008	6082558714
2009	3215106463
2010	4045535749
2011	4555826088
2012	4820705040
2013	5935947200
2014	8017288217
2015	6475843861
2016	9746086065
2017	19802399140
2018	18994480149
2019	17335704302
2020	17519790374