Year	current US$
1960	71000000
1961	78000000
1962	97000000
1963	103000000
1964	103000000
1965	134000000
1966	138000000
1967	151000000
1968	153000000
1969	165000000
1970	159000000
1971	170000000
1972	185000000
1973	230000000
1974	390000000
1975	558000000
1976	555000000
1977	618000000
1978	808000000
1979	894000000
1980	665000000
1981	917000000
1982	554000000
1983	577000000
1984	489000000
1985	691000000
1986	674000000
1987	766000000
1988	591000000
1989	611000000
1990	687000000
1991	970000000
1992	1090000000
1993	1206000000
1994	1209000000
1995	1424000000
1996	1635000000
1997	1851000000
1998	1983000000
1999	1755000000
2000	1830000000
2001	1708000000
2002	1775000000
2003	1616000000
2004	1877000000
2005	2431000000
2006	2916000000
2007	3586000000
2008	5081000000
2009	4545000000
2010	5590000000
2011	7927000000
2012	8578000000
2013	9338000000
2014	10519000000
2015	9766000000
2016	8427000000
2017	9288000000
2018	9996000000
2019	9784000000
2020	7080000000
2021	9121000000
2022	13049000000
2023	11120000000