Year	current US$
1960	128000000
1961	114000000
1962	136000000
1963	147000000
1964	164000000
1965	195000000
1966	207000000
1967	275000000
1968	303000000
1969	321000000
1970	368000000
1971	445000000
1972	392000000
1973	579000000
1974	614000000
1975	429000000
1976	353000000
1977	720000000
1978	885000000
1979	1112000000
1980	1328000000
1981	1662000000
1982	886000000
1983	983000000
1984	1256000000
1985	1401000000
1986	1086000000
1987	1303000000
1988	1372000000
1989	1338000000
1990	1578000000
1991	1347000000
1992	1988000000
1993	1463000000
1994	1454000000
1995	1468000000
1996	2040000000
1997	2597000000
1998	2079000000
1999	3109000000
2000	3040000000
2001	3179000000
2002	3760000000
2003	5480000000
2004	5832000000
2005	8353000000
2006	8778000000
2007	13661000000
2008	20982000000
2009	22660000000
2010	16667000000
2011	20228000000
2012	23717000000
2013	26331000000
2014	28580000000
2015	20693000000
2016	13040000000
2017	14463000000
2018	15798000000
2019	13962000000
2020	9338000000
2021	11379000000
2022	17803000000
2023	16108000000