Year	current US$
1960	54000000
1961	50000000
1962	58000000
1963	61000000
1964	58000000
1965	71000000
1966	82000000
1967	82000000
1968	89000000
1969	98000000
1970	108000000
1971	115000000
1972	134000000
1973	173000000
1974	152000000
1975	152000000
1976	258000000
1977	318000000
1978	344000000
1979	456000000
1980	532000000
1981	562000000
1982	544000000
1983	503000000
1984	573000000
1985	476000000
1986	451000000
1987	568000000
1988	705000000
1989	791000000
1990	951000000
1991	952000000
1992	987000000
1993	867000000
1994	968000000
1995	1229000000
1996	1391000000
1997	1250000000
1998	1061000000
1999	997000000
2000	951000000
2001	976000000
2002	843000000
2003	923000000
2004	948000000
2005	1465000000
2006	1333000000
2007	1394000000
2008	1633000000
2009	1257000000
2010	1402000000
2011	1818000000
2012	1740000000
2013	2019000000
2014	3163000000
2015	3295000000
2016	2965000000
2017	3288000000
2018	5052000000
2019	3453000000
2020	3063000000
2021	3905000000
2022	4363000000
2023	4453000000