Year	US Dollars adjusted for inflation)
1960	232000000
1961	159000000
1962	134000000
1963	324000000
1964	403000000
1965	317000000
1966	294000000
1967	339000000
1968	222000000
1969	157000000
1970	122000000
1971	97000000
1972	170000000
1973	231000000
1974	256000000
1975	292000000
1976	214000000
1977	100000000
1978	198000000
1979	249000000
1980	247000000
1981	454000000
1982	171000000
1983	179000000
1984	93000000
1985	84000000
1986	144000000
1987	142000000
1988	126000000
1989	105000000
1990	94000000
1991	55000000
1992	60000000
1993	46000000
1994	307000000
1995	106000000
1996	98000000
1997	196000000
1998	294000000
1999	224000000
2000	206000000
2001	165000000
2002	74000000
2003	66000000
2004	47000000
2005	78000000
2006	120000000
2007	51000000
2008	51000000
2009	17000000
2010	11000000
2011	191000000
2012	207000000
2013	54000000
2014	44000000
2015	26000000
2016	70000000
2017	32000000
2018	7000000
2019	7000000
2020	3000000
2021	122000000
2022	318000000