Year	current US$
1960	63000000
1961	68000000
1962	90000000
1963	107000000
1964	125000000
1965	149000000
1966	142000000
1967	152000000
1968	162000000
1969	159000000
1970	179000000
1971	187000000
1972	249000000
1973	278000000
1974	381000000
1975	375000000
1976	542000000
1977	637000000
1978	646000000
1979	567000000
1980	451000000
1981	508000000
1982	406000000
1983	429000000
1984	386000000
1985	302000000
1986	247000000
1987	273000000
1988	233000000
1989	311000000
1990	330000000
1991	272000000
1992	223000000
1993	267000000
1994	335000000
1995	466000000
1996	466000000
1997	577000000
1998	573000000
1999	545000000
2000	881000000
2001	895000000
2002	914000000
2003	1056000000
2004	1369000000
2005	1654000000
2006	1932000000
2007	2186000000
2008	2531000000
2009	2391000000
2010	3251000000
2011	4133000000
2012	4686000000
2013	4794000000
2014	5126000000
2015	4839000000
2016	4782000000
2017	5170000000
2018	5014000000
2019	5272000000
2020	5087000000
2021	6495000000
2022	7360000000
2023	7378000000