Year	current US$
1960	39500000
1961	200000
1962	39700000
1963	55500000
1964	62900000
1965	53900000
1966	48800000
1967	49200000
1968	49700000
1969	61146000
1970	71561000
1971	70883000
1972	76042000
1973	94263000
1974	156468000
1975	173309000
1976	138002000
1977	180315000
1978	206137000
1979	262353000
1980	363690000
1981	318174000
1982	289073000
1983	244220000
1984	260454000
1985	234891000
1986	275798767
1987	331867391.1
1988	368980431.8
1989	388852306.3
1990	497648828.1
1991	450593453.5
1992	418029000
1993	449094063.7
1994	546740203.2
1995	623964209.8000001
1996	752869825.4
1997	598568472.8
1998	635488160.0999999
1999	715722713.9
2000	453350164
2001	455018397
2002	511649149
2003	498431370
2004	545916116
2005	686983731
2006	505677244
2007	695960020
2008	763569878
2009	593207590
2010	653957147
2011	810169568
2012	928143467
2013	853069142
2014	1108923670
2015	743301375
2016	768330514
2017	797889804
2018	861499817
2019	851034517
2020	829935269