Year	current US$
1960	46000000
1961	40000000
1962	48000000
1963	63000000
1964	73000000
1965	62000000
1966	57000000
1967	63000000
1968	68000000
1969	72000000
1970	87000000
1971	87000000
1972	95000000
1973	122000000
1974	190000000
1975	203000000
1976	172000000
1977	224000000
1978	251000000
1979	314000000
1980	470000000
1981	400000000
1982	377000000
1983	306000000
1984	332000000
1985	307000000
1986	336000000
1987	380000000
1988	431000000
1989	494000000
1990	497000000
1991	450000000
1992	443000000
1993	450000000
1994	572000000
1995	619000000
1996	748000000
1997	622000000
1998	512000000
1999	609000000
2000	585000000
2001	537000000
2002	515000000
2003	668000000
2004	693000000
2005	701000000
2006	694000000
2007	755000000
2008	922000000
2009	630000000
2010	841000000
2011	1069000000
2012	1221000000
2013	1108000000
2014	1373000000
2015	895000000
2016	926000000
2017	956000000
2018	1041000000
2019	1033000000
2020	826000000
2021	815000000
2022	1055000000
2023	1017000000