Year	current US$
1960	54000000
1961	54000000
1962	55000000
1963	58000000
1964	81000000
1965	93000000
1966	90000000
1967	103000000
1968	100000000
1969	111000000
1970	115000000
1971	126000000
1972	145000000
1973	158000000
1974	230000000
1975	262000000
1976	294000000
1977	398000000
1978	382000000
1979	411000000
1980	504000000
1981	568000000
1982	514000000
1983	472000000
1984	346000000
1985	299000000
1986	327000000
1987	294000000
1988	351000000
1989	443000000
1990	472000000
1991	509000000
1992	542000000
1993	525000000
1994	423000000
1995	585000000
1996	501000000
1997	658000000
1998	552000000
1999	486000000
2000	526000000
2001	461000000
2002	492000000
2003	704000000
2004	742000000
2005	1050000000
2006	1013000000
2007	1044000000
2008	1304000000
2009	1390000000
2010	1398000000
2011	1638000000
2012	1994000000
2013	2174000000
2014	1982000000
2015	2028000000
2016	1252000000
2017	1280000000
2018	1527000000
2019	1711000000
2020	1533000000
2021	1381000000
2022	1803000000
2023	1822000000