Year	current US$
1960	604000000
1961	623000000
1962	569000000
1963	579000000
1964	711000000
1965	770000000
1966	718000000
1967	626000000
1968	540000000
1969	696000000
1970	1059000000
1971	1514000000
1972	1505000000
1973	1862000000
1974	2772000000
1975	6041000000
1976	8213000000
1977	11095000000
1978	12821000000
1979	10218000000
1980	16660000000
1981	20877000000
1982	16061000000
1983	12254000000
1984	9364000000
1985	8877000000
1986	4034000000
1987	3912000000
1988	4717000000
1989	4187000000
1990	5627000000
1991	8986000000
1992	8275000000
1993	7508000000
1994	6613000000
1995	8222000000
1996	6438000000
1997	9501000000
1998	9211000000
1999	8588000000
2000	8721000000
2001	11586000000
2002	7547000000
2003	10853000000
2004	14164000000
2005	20754000000
2006	26523000000
2007	34830000000
2008	49951000000
2009	33906000000
2010	44235000000
2011	56000000000
2012	51000000000
2013	56000000000
2014	58300000000
2015	44700000000
2016	35532000000
2017	31273000000
2018	43007000000
2019	55257000000
2020	35740000000
2021	51880000000
2022	60351000000
2023	45946000000