Year	current US$
1970	270100000
1971	311000000
1972	494700000
1973	837100000
1974	1773900000
1975	2745400000
1976	3419700000
1977	5186100000
1978	5376800000
1979	6956600000
1980	8569900000
1981	9366400000
1982	9439700000
1983	8356000000
1984	7043200000
1985	6484000000
1986	6431000000
1987	6901000000
1988	8526000000
1989	9559000000
1990	11472000000
1991	13764700000
1992	17414000000
1993	19520000000
1994	21024000000
1995	20973000000
1996	22628000000
1997	22969592885
1998	24728000000
1999	35746228984
2000	25426739998
2001	29560399998
2002	30352500012
2003	38623783912
2004	72714899154
2005	81646253970
2006	98891252904
2007	128239000000
2008	177173000000
2009	165477000000
2010	188278000000
2011	212536000000
2012	262928000000
2013	296962000000
2014	300648000000
2015	289017000000
2016	272698000000
2017	257713000000
2018	244885000000
2019	250631000000
2020	225493000000