Year	current US$
1960	467700000
1961	508800000
1962	619300000
1963	689100000
1964	541800000
1965	575600000
1966	724300000
1967	690600000
1968	770400000
1969	756470000
1970	888580000
1971	1086000000
1972	1511780000
1973	2095600000
1974	3776780000
1975	4737820000
1976	5129860000
1977	5796850000
1978	4600370000
1979	5066070000
1980	7667500000
1981	8931470000
1982	8800440000
1983	9187240000
1984	10671310000
1985	11274630000
1986	11027030000
1987	14654876000
1988	14694870000
1989	15934376000
1990	23147090000
1991	21132330000
1992	24372601000
1993	29355000000
1994	23389071000
1995	35763118000
1996	42464369755
1997	48656030000
1998	45932659000
1999	40671272620
2000	54502821420
2001	41399083900
2002	51554369436
2003	69339692061
2004	97340653806
2005	116527000000
2006	139429000000
2007	169913000000
2008	201964000000
2009	140928000000
2010	185544000000
2011	240842000000
2012	236545000000
2013	260823000000
2014	251142000000
2015	213619000000
2016	202189000000
2017	238715000000
2018	231152000000
2019	210345000000
2020	219517000000