Year	US Dollars adjusted for inflation)
1960	221000000
1961	238000000
1962	264000000
1963	323000000
1964	326000000
1965	190000000
1966	109000000
1967	84000000
1968	70000000
1969	70000000
1970	38000000
1971	582000000
1972	773000000
1973	658000000
1974	586000000
1975	388000000
1976	499000000
1977	384000000
1978	369000000
1979	253000000
1980	380000000
1981	531000000
1982	248000000
1983	463000000
1984	382000000
1985	654000000
1986	420000000
1987	1993000000
1988	1788000000
1989	1783000000
1990	363000000
1991	491000000
1992	484000000
1993	912000000
1994	935000000
1995	741000000
1996	555000000
1997	567000000
1998	249000000
1999	222000000
2000	302000000
2001	463000000
2002	471000000
2003	567000000
2004	537000000
2005	501000000
2006	634000000
2007	831000000
2008	968000000
2009	977000000
2010	1085000000
2011	1002000000
2012	1210000000
2013	787000000
2014	591000000
2015	520000000
2016	458000000
2017	527000000
2018	380000000
2019	890000000
2020	801000000
2021	868000000
2022	837000000