Year	current US$
1960	83000000
1961	62000000
1962	68000000
1963	81000000
1964	126000000
1965	135000000
1966	150000000
1967	159000000
1968	169000000
1969	196000000
1970	214000000
1971	222000000
1972	244000000
1973	324000000
1974	400000000
1975	394000000
1976	460000000
1977	447000000
1978	504000000
1979	537000000
1980	600000000
1981	529000000
1982	477000000
1983	428000000
1984	452000000
1985	436000000
1986	408000000
1987	382000000
1988	396000000
1989	460000000
1990	868000000
1991	311000000
1992	590000000
1993	440000000
1994	353000000
1995	820000000
1996	630000000
1997	430000000
1998	425000000
1999	469000000
2000	329000000
2001	128000000
2002	176000000
2003	109000000
2004	104000000
2005	131000000
2006	158000000
2007	200000000
2008	242000000
2009	149000000
2010	222000000
2011	367000000
2012	460000000
2013	559000000
2014	444000000
2015	283000000
2016	279000000
2017	358000000
2018	548000000
2019	543000000
2020	608000000
2021	881000000
2022	1058000000
2023	1100000000