Year	current US$
1960	121000000
1961	121000000
1962	119000000
1963	171000000
1964	202000000
1965	229000000
1966	207000000
1967	247000000
1968	249000000
1969	250000000
1970	284000000
1971	297000000
1972	324000000
1973	431000000
1974	700000000
1975	733000000
1976	839000000
1977	1053000000
1978	1286000000
1979	1504000000
1980	1598000000
1981	1688000000
1982	1388000000
1983	1126000000
1984	1279000000
1985	1175000000
1986	959000000
1987	1447000000
1988	1557000000
1989	1654000000
1990	1649000000
1991	1851000000
1992	2532000000
1993	2599000000
1994	2781000000
1995	3293000000
1996	3146000000
1997	3852000000
1998	4651000000
1999	4560000000
2000	5171000000
2001	5607000000
2002	7659000000
2003	8127000000
2004	9475000000
2005	10499000000
2006	11915000000
2007	13576000000
2008	14547000000
2009	11531000000
2010	13838000000
2011	16613000000
2012	16994000000
2013	17518000000
2014	18282000000
2015	17640000000
2016	17000000000
2017	18388000000
2018	19699000000
2019	19882000000
2020	18205000000
2021	26607000000
2022	32116000000
2023	30318000000