Year	current US$
1960	66000000
1961	85000000
1962	69000000
1963	79000000
1964	100000000
1965	105000000
1966	139000000
1967	163000000
1968	176000000
1969	296000000
1970	337000000
1971	511000000
1972	485000000
1973	764000000
1974	1908000000
1975	2697000000
1976	3125000000
1977	3568000000
1978	3150000000
1979	3514000000
1980	7546000000
1981	7284000000
1982	6349000000
1983	4616000000
1984	4098000000
1985	3078000000
1986	3289000000
1987	3080000000
1988	2291000000
1989	3137000000
1990	1112000000
1991	1091000000
1992	1038000000
1993	954000000
1994	1056000000
1995	1243000000
1996	1365000000
1997	1622000000
1998	1816000000
1999	1751000000
2000	2002000000
2001	1929000000
2002	1839000000
2003	1874000000
2004	1977000000
2005	2567000000
2006	2984000000
2007	3104000000
2008	3201000000
2009	2699000000
2010	2863000000
2011	3411000000
2012	3647000000
2013	3366000000
2014	3790000000
2015	3162000000
2016	2975000000
2017	3428000000
2018	3521000000
2019	3321000000
2020	2205000000
2021	3483000000
2022	3758000000
2023	4188000000