Year	current US$
1960	638000000
1961	703000000
1962	759000000
1963	867000000
1964	1019000000
1965	866000000
1966	926000000
1967	999000000
1968	1102000000
1969	1222000000
1970	1311000000
1971	1387000000
1972	1292000000
1973	1793000000
1974	2648000000
1975	3883000000
1976	4066000000
1977	4700000000
1978	4780000000
1979	5085000000
1980	6505000000
1981	6545000000
1982	6637000000
1983	7211000000
1984	8167000000
1985	7983000000
1986	9173000000
1987	7612000000
1988	7579000000
1989	7526000000
1990	4600000000
1991	2600000000
1992	1500000000
1993	1500000000
1994	2055000000
1995	2825000000
1996	3205000000
1997	3987000000
1998	4197000000
1999	4365000000
2000	4843000000
2001	4839000000
2002	4176000000
2003	4673000000
2004	5615000000
2005	8084000000
2006	10258000000
2007	10886000000
2008	15373000000
2009	9619000000
2010	11496000000
2011	14243000000
2012	13869000000
2013	14707000000
2014	13037000000
2015	11702000000
2016	10270000000
2017	10172000000
2018	11484000000
2019	9901000000
2020	7230000000
2021	8431000000
2022	9833000000
2023	8920000000