Year	current US$
1960	50000000
1961	73000000
1962	66000000
1963	46000000
1964	49000000
1965	53000000
1966	70000000
1967	53000000
1968	50000000
1969	65000000
1970	78000000
1971	80000000
1972	107000000
1973	185000000
1974	160000000
1975	216000000
1976	283000000
1977	247000000
1978	272000000
1979	253000000
1980	360000000
1981	351000000
1982	296000000
1983	267000000
1984	438000000
1985	448000000
1986	451000000
1987	468000000
1988	605000000
1989	589000000
1990	723000000
1991	735000000
1992	740000000
1993	730000000
1994	706000000
1995	819000000
1996	648000000
1997	620000000
1998	537000000
1999	556000000
2000	612000000
2001	601000000
2002	667000000
2003	640000000
2004	780000000
2005	820000000
2006	956000000
2007	1218000000
2008	1366000000
2009	1060000000
2010	1405000000
2011	2106000000
2012	2254000000
2013	1869000000
2014	2372000000
2015	2192000000
2016	4429000000
2017	3484000000
2018	3386000000
2019	3470000000
2020	3727000000
2021	4187000000
2022	4843000000
2023	4696000000