Year	current US$
1960	12500000
1961	200000
1962	14400000
1963	19600000
1964	21200000
1965	25200000
1966	34800000
1967	25400000
1968	28856000
1969	24371000
1970	31661000
1971	38412000
1972	54158000
1973	62342000
1974	52726000
1975	91247000
1976	133582000
1977	160656000
1978	282338000
1979	449014000
1980	566509000
1981	464338000
1982	332080000
1983	298893000
1984	279488952.40000004
1985	209025794.4
1986	316613141.40000004
1987	312318072.9
1988	288539580.1
1989	243598677.9
1990	282588874.5
1991	277717409.8
1992	271013306
1993	220858985.4
1994	187887459.9
1995	192776326.7
1996	219426188.5
1997	192268097.89999998
1998	206137188.2
1999	178689548.7
2000	196658693
2001	162730839
2002	168859894
2003	200811879
2004	222995118
2005	348804858
2006	325850440
2007	485747088
2008	748276053
2009	619746393
2010	470278914
2011	1075289029
2012	1375250040
2013	1335528287
2014	983664329
2015	787660528
2016	930050764
2017	1992100773
2018	1564505348
2019	904768012
2020	1469723883