Year	current US$
1960	87000000
1961	99000000
1962	116000000
1963	125000000
1964	124000000
1965	121000000
1966	128000000
1967	126000000
1968	114000000
1969	126000000
1970	114000000
1971	141000000
1972	164000000
1973	172000000
1974	243000000
1975	350000000
1976	261000000
1977	328000000
1978	395000000
1979	425000000
1980	841000000
1981	886000000
1982	962000000
1983	1064000000
1984	1390000000
1985	1194000000
1986	1404000000
1987	996000000
1988	900000000
1989	822000000
1990	936000000
1991	443000000
1992	398000000
1993	465000000
1994	391000000
1995	387000000
1996	661000000
1997	604000000
1998	462000000
1999	1012000000
2000	1176000000
2001	1696000000
2002	2452000000
2003	2101000000
2004	2177000000
2005	2471000000
2006	2744000000
2007	3022000000
2008	3020000000
2009	3336000000
2010	5154000000
2011	6515000000
2012	9069000000
2013	8554000000
2014	7729000000
2015	7723000000
2016	6534000000
2017	7065000000
2018	7407000000
2019	6777000000
2020	6538000000
2021	5308000000
2022	5529000000
2023	6064000000