Year	current US$
1960	83000000
1961	82000000
1962	57000000
1963	81000000
1964	95000000
1965	88000000
1966	83000000
1967	70000000
1968	96000000
1969	106000000
1970	101000000
1971	98000000
1972	115000000
1973	131000000
1974	144000000
1975	118000000
1976	99000000
1977	136000000
1978	170000000
1979	200000000
1980	224000000
1981	150000000
1982	111000000
1983	119000000
1984	133000000
1985	130000000
1986	144000000
1987	130000000
1988	106000000
1989	138000000
1990	138000000
1991	145000000
1992	149000000
1993	118000000
1994	115000000
1995	42000000
1996	47000000
1997	17000000
1998	7000000
1999	6000000
2000	13000000
2001	29000000
2002	49000000
2003	92000000
2004	139000000
2005	158000000
2006	231000000
2007	245000000
2008	216000000
2009	231000000
2010	341000000
2011	350000000
2012	1122000000
2013	1917000000
2014	1552000000
2015	512000000
2016	624000000
2017	567000000
2018	554000000
2019	635000000
2020	423000000
2021	697000000
2022	1124000000
2023	1270000000