Year	current US$
1960	188430000
1962	161870000
1963	148590000
1968	1272160000
1969	1548650000
1970	1556020000
1971	1757730000
1972	2191390000
1973	3664300000
1974	5835580000
1975	5408310000
1976	6631890000
1977	8278500000
1978	10182250000
1979	14303450000
1980	19493220000
1981	21076870000
1982	20917920000
1983	21958200000
1984	24208580000
1985	22972270000
1986	22607920000
1987	28788260000
1988	39429740000
1989	44765147891
1990	52777061827
1991	59213923775
1992	63472251353
1993	74079902981
1994	96887939010
1995	118194000000
1996	125165000000
1997	125403000000
1998	109915000000
1999	114754000000
2000	138046000000
2001	121826000000
2002	125219000000
2003	160073000000
2004	198707000000
2005	229545000000
2006	272158000000
2007	299214000000
2008	338413000000
2009	270096000000
2010	352312000000
2011	410145000000
2012	409721000000
2013	412173000000
2014	410090000000
2015	351530000000
2016	330837000000
2017	366066000000
2018	412966000000
2019	390698000000
2020	287889000000