Year	current US$
1960	86000000
1961	71000000
1962	33000000
1963	45000000
1964	28000000
1965	21000000
1966	15000000
1967	11000000
1968	8000000
1969	8000000
1970	8000000
1971	8000000
1972	13000000
1973	58000000
1974	25000000
1975	229000000
1976	402000000
1977	594000000
1978	648000000
1979	587000000
1980	338000000
1981	401000000
1982	526000000
1983	616000000
1984	649000000
1985	698000000
1986	789000000
1987	854000000
1988	1038000000
1989	1946000000
1990	2404000000
1991	2087000000
1992	2581000000
1993	2985000000
1994	4054000000
1995	5449000000
1996	7255000000
1997	9185000000
1998	9361000000
1999	11541000000
2000	14483000000
2001	15029000000
2002	16706000000
2003	20149000000
2004	26485000000
2005	32442000000
2006	39826000000
2007	48561000000
2008	62685000000
2009	57096000000
2010	72237000000
2011	96906000000
2012	114529000000
2013	132033000000
2014	150217000000
2015	162065000000
2016	176581000000
2017	215014000000
2018	243699000000
2019	264268000000
2020	282629000000
2021	335978000000
2022	371288000000
2023	353782000000