Year	current US$
1960	1000000
1961	2500000
1962	17100000
1963	18100000
1964	30000000
1965	26900000
1966	36000000
1967	31900000
1968	38300000
1969	46481000
1970	55137000
1971	56037000
1972	50260000
1973	62038000
1974	187834000
1975	125799000
1976	103523000
1977	147026000
1978	234956000
1979	213945000
1980	337360000
1981	207760000
1982	177024000
1983	162228835.8
1984	193121586.6
1985	190045324.4
1986	203728172.8
1987	243605232.3
1988	242311000
1989	245073000
1990	266723000
1991	267058000
1992	255813078.60000002
1993	195932374.2
1994	275833865.4
1995	221830812.7
1996	238666054.1
1997	236366133.9
1998	252633298.9
1999	237260708.1
2000	192432956
2001	220704551
2002	249209158
2003	416846119
2004	407862689
2005	362422552
2006	387777845
2007	279990606
2008	687086803
2009	663109866
2010	742288917
2011	993785401
2012	1116854793
2013	1291037559
2014	959096575
2015	793106116
2016	849580045
2017	866972802
2018	1022822892
2019	915356410
2020	433521980