Year	current US$
1960	408800000
1961	476300000
1962	525799999.99999994
1963	537400000
1964	667200000
1965	667600000
1966	765500000
1967	774000000
1968	863600000
1969	864840000
1970	1047839999.9999999
1971	893850000
1972	945760000
1973	1051490000
1974	1520870000
1975	1331890000
1976	1341800000
1977	1732280000
1978	1976550000
1979	3675120000
1980	3914420000
1981	3246510000
1982	2918720000
1983	2577370000
1984	3086410000
1985	2980560000
1986	2504500000
1987	2604980000
1988	2688790000
1989	3488229000
1990	3276215000
1991	3329111000
1992	3484360000
1993	3464605000
1994	4506841000
1995	5512569000
1996	5853698000
1997	6706869000
1998	5699984000
1999	6019424000
2000	6760895313
2001	6831892243
2002	7544697753
2003	8762504980
2004	12298267937
2005	17062768352
2006	23230110895
2007	27587755072
2008	31206968445
2009	26535226334
2010	34909309885
2011	45855380920
2012	45497984582
2013	41895174165
2014	38365262981
2015	33175474994.999996
2016	37019780721
2017	44756434955
2018	47883382800
2019	44735961200
2020	35785470788