Year	current US$
1970	72000000
1971	140000000
1972	190000000
1973	178000000
1974	130000000
1975	101000000
1976	72000000
1977	106000000
1978	194000000
1979	335000000
1980	421000000
1981	531799987.8000001
1982	280299987.8
1983	242600006.1
1984	253000000
1985	209399993.9
1986	448700012.2
1987	613599975.6
1988	542000000
1989	783700012.2
1990	811900024.4
1991	876799987.8
1992	1160199951
1993	1263300049
1994	1602300049
1995	177900000
1996	157600000
1997	200200000
1998	134500000
1999	174200000
2000	182400000
2001	195600000
2002	166600000
2003	171200000
2004	297700000
2005	376900000
2006	488800000
2007	579700000
2008	628400000
2009	507000000
2010	571500000
2011	594600000
2012	684900000
2013	764800000
2014	859000000
2015	853100000
2016	963400000
2017	991200000
2018	1021600000
2019	953400000
2020	1032700000
2021	1230100000
2022	1265200000
2023	960800000