Year	current US$
1960	181700000
1961	178400000
1962	226600000
1963	225900000
1964	196400000
1965	195100000
1966	202700000
1967	214100000
1968	232300000
1969	240193000
1970	298441000
1971	328519000
1972	357879000
1973	436698000
1974	350362000
1975	439413000
1976	554234000
1977	661114000
1978	485176000
1979	589824000
1980	542326000
1981	640632000
1982	507303000
1983	623581000
1984	680004119.6
1985	392160172.40000004
1986	333318000
1987	497824284.3
1988	525815109.90000004
1989	604190304.4
1990	514518430.1
1991	365624499.59999996
1992	320230814.3
1993	351721651.5
1994	473921935.2
1995	534835518.09999996
1996	495524991.2
1997	509559491.40000004
1998	541634343.9
1999	705573431
2000	1481268330
2001	1518883807
2002	1659352106
2003	2607167737
2004	3758797739
2005	4824298877
2006	5656568002
2007	8879249995
2008	11670501994
2009	8257105001
2010	11404279509
2011	9688841000
2012	3364970000
2013	4789732000
2014	4350209667
2015	3168355000
2016	2598726000
2017	4100380502
2018	3484681535
2019	9814556761
2020	10798763494