Year	US Dollars adjusted for inflation)
1960	544000000
1961	1122000000
1962	371000000
1963	647000000
1964	920000000
1965	1049000000
1966	994000000
1967	1265000000
1968	1653000000
1969	1515000000
1970	869000000
1971	1868000000
1972	1815000000
1973	1337000000
1974	1302000000
1975	1108000000
1976	1935000000
1977	2369000000
1978	1199000000
1979	1199000000
1980	1768000000
1981	2123000000
1982	2275000000
1983	2637000000
1984	2782000000
1985	2999000000
1986	4265000000
1987	3929000000
1988	3855000000
1989	3691000000
1990	2861000000
1991	1896000000
1992	1190000000
1993	740000000
1994	886000000
1995	1403000000
1996	851000000
1997	1673000000
1998	757000000
1999	1215000000
2000	983000000
2001	1201000000
2002	2031000000
2003	2743000000
2004	2214000000
2005	1198000000
2006	1475000000
2007	2281000000
2008	1644000000
2009	1884000000
2010	2898000000
2011	3610000000
2012	4396000000
2013	5367000000
2014	3330000000
2015	2928000000
2016	2782000000
2017	2892000000
2018	2118000000
2019	3470000000
2020	2847000000
2021	4167000000
2022	2846000000