Year	US Dollars adjusted for inflation)
1960	26000000
1961	34000000
1962	38000000
1963	139000000
1964	118000000
1965	152000000
1966	216000000
1967	1422000000
1968	2288000000
1969	2570000000
1970	60000000
1971	171000000
1972	217000000
1973	234000000
1974	319000000
1975	337000000
1976	251000000
1977	256000000
1978	179000000
1979	219000000
1980	544000000
1981	800000000
1982	756000000
1983	286000000
1984	633000000
1985	355000000
1986	273000000
1987	207000000
1988	281000000
1989	209000000
1990	120000000
1991	940000000
1992	1134000000
1993	783000000
1994	411000000
1995	496000000
1996	568000000
1997	496000000
1998	752000000
1999	132000000
2000	937000000
2001	1282000000
2002	720000000
2003	769000000
2004	215000000
2005	31000000
2006	375000000
2007	868000000
2008	570000000
2009	399000000
2010	502000000
2011	389000000
2012	595000000
2013	509000000
2014	217000000
2015	423000000
2016	282000000
2017	1002000000
2018	518000000
2019	342000000
2020	652000000
2021	878000000
2022	799000000