Year	current US$
1961	500000
1963	34100000
1964	36300000
1965	42700000
1966	37500000
1967	51300000
1968	32299999.999999996
1969	38910000
1970	44819000
1971	59430000
1972	78534000
1973	126288000
1974	178964000
1975	190072000
1976	150195000
1977	158751000
1978	202548000
1979	304455000
1980	241951000
1981	287435000
1982	401837000
1983	342239200
1984	350546938.4
1985	299352185.4
1986	443956541.09999996
1987	374148000
1988	521056366
1989	564224931
1990	714168821.6
1991	667046223
1992	737760999
1993	737248872
1994	712335999.4
1995	990280861.3
1996	1111901813
1997	1130710561
1998	1222072054
1999	1254430462
2000	708784788
2001	988426970
2002	927941612
2003	1271835880
2004	1365488073
2005	1544991855
2006	1820951312
2007	2186445074
2008	3481670085
2009	3740419077
2010	4705046244
2011	3353364958
2012	3474183485
2013	3631155198
2014	3713477767
2015	3178073974
2016	3854223837
2017	4345639129
2018	4556002412
2019	4692480722
2020	5447294715