Year	current US$
1960	21000000
1961	24000000
1962	40000000
1963	39000000
1964	53000000
1965	62000000
1966	71000000
1967	79000000
1968	92000000
1969	108000000
1970	109000000
1971	117000000
1972	123000000
1973	138000000
1974	211000000
1975	286000000
1976	238000000
1977	251000000
1978	256000000
1979	303000000
1980	361000000
1981	328000000
1982	375000000
1983	320000000
1984	276000000
1985	336000000
1986	349000000
1987	358000000
1988	307000000
1989	318000000
1990	340000000
1991	358000000
1992	502000000
1993	553000000
1994	583000000
1995	625000000
1996	623000000
1997	723000000
1998	784000000
1999	822000000
2000	859000000
2001	911000000
2002	846000000
2003	864000000
2004	944000000
2005	7050000000
2006	8034000000
2007	8821000000
2008	9817000000
2009	10717000000
2010	10987000000
2011	14555000000
2012	15945000000
2013	14732000000
2014	12960000000
2015	11348000000
2016	11195000000
2017	11093000000
2018	11480000000
2019	11318000000
2020	9483000000
2021	13161000000
2022	15278000000
2023	15713000000