Year	current US$
1960	44000000
1961	41000000
1962	42000000
1963	47000000
1964	48000000
1965	58000000
1966	87000000
1967	107000000
1968	116000000
1969	130000000
1970	144000000
1971	157000000
1972	171000000
1973	179000000
1974	269000000
1975	277000000
1976	276000000
1977	310000000
1978	369000000
1979	444000000
1980	514000000
1981	474000000
1982	429000000
1983	367000000
1984	356000000
1985	329000000
1986	335000000
1987	306000000
1988	410000000
1989	542000000
1990	472000000
1991	359000000
1992	391000000
1993	326000000
1994	271000000
1995	477000000
1996	537000000
1997	564000000
1998	345000000
1999	351000000
2000	396000000
2001	403000000
2002	469000000
2003	638000000
2004	874000000
2005	997000000
2006	1175000000
2007	1359000000
2008	1743000000
2009	1402000000
2010	2026000000
2011	2467000000
2012	2695000000
2013	2416000000
2014	2113000000
2015	1652000000
2016	1439000000
2017	1992000000
2018	2180000000
2019	2155000000
2020	2193000000
2021	2291000000
2022	2579000000
2023	2498000000