Year	current US$
1960	560000000
1961	605000000
1962	531000000
1963	524000000
1964	673000000
1965	859000000
1966	931000000
1967	1119000000
1968	1384000000
1969	1527000000
1970	1662000000
1971	1873000000
1972	2409000000
1973	3393000000
1974	5433000000
1975	10343000000
1976	12894000000
1977	14070000000
1978	13550000000
1979	9738000000
1980	12246000000
1981	14693000000
1982	11955000000
1983	18320000000
1984	15370000000
1985	11635000000
1986	10521000000
1987	9570000000
1988	9454000000
1989	14794000000
1990	20322000000
1991	27927000000
1992	25860000000
1993	21427000000
1994	13774000000
1995	13882000000
1996	16274000000
1997	14196000000
1998	14323000000
1999	13324000000
2000	13898000000
2001	16709000000
2002	20617000000
2003	24798000000
2004	31976000000
2005	40041000000
2006	40772000000
2007	44942000000
2008	57401000000
2009	50768000000
2010	65404000000
2011	61760000000
2012	57292000000
2013	46571000000
2014	55106000000
2015	44937000000
2016	43080000000
2017	49499000000
2018	49353000000
2019	41828000000
2020	38757000000
2021	49086000000
2022	58552000000
2023	65276000000