Year	US Dollars adjusted for inflation)
1960	809000000
1961	338000000
1962	221000000
1963	204000000
1964	1718000000
1965	1154000000
1966	324000000
1967	605000000
1968	552000000
1969	525000000
1970	644000000
1971	771000000
1972	670000000
1973	630000000
1974	997000000
1975	1668000000
1976	1656000000
1977	960000000
1978	1078000000
1979	985000000
1980	1057000000
1981	1337000000
1982	1450000000
1983	1695000000
1984	2052000000
1985	1975000000
1986	1893000000
1987	1946000000
1988	1997000000
1989	2283000000
1990	2682000000
1991	2940000000
1992	2519000000
1993	2121000000
1994	1017000000
1995	1243000000
1996	859000000
1997	830000000
1998	1476000000
1999	1244000000
2000	483000000
2001	420000000
2002	431000000
2003	455000000
2004	388000000
2005	372000000
2006	460000000
2007	549000000
2008	987000000
2009	988000000
2010	653000000
2011	299000000
2012	235000000
2013	339000000
2014	329000000
2015	356000000
2016	345000000
2017	434000000
2018	755000000
2019	972000000
2020	923000000
2021	947000000
2022	1291000000