Year	current US$
1960	50000000
1961	53000000
1962	58000000
1963	70000000
1964	64000000
1965	74000000
1966	67000000
1967	66000000
1968	72000000
1969	82000000
1970	86000000
1971	100000000
1972	122000000
1973	143000000
1974	230000000
1975	217000000
1976	291000000
1977	306000000
1978	321000000
1979	474000000
1980	670000000
1981	694000000
1982	708000000
1983	729000000
1984	633000000
1985	567000000
1986	552000000
1987	512000000
1988	395000000
1989	236000000
1990	235000000
1991	189000000
1992	181000000
1993	688000000
1994	105000000
1995	166000000
1996	128000000
1997	144000000
1998	159000000
1999	166000000
2000	137000000
2001	68000000
2002	100000000
2003	144000000
2004	305000000
2005	384000000
2006	416000000
2007	454000000
2008	540000000
2009	403000000
2010	388000000
2011	376000000
2012	429000000
2013	515000000
2014	570000000
2015	571000000
2016	596000000
2017	723000000
2018	875000000
2019	864000000
2020	777000000
2021	850000000
2022	819000000
2023	903000000