Year	US Dollars adjusted for inflation)
1960	304000000
1961	38000000
1962	19000000
1963	127000000
1964	34000000
1965	57000000
1966	74000000
1967	150000000
1968	70000000
1969	21000000
1970	57000000
1971	198000000
1972	51000000
1973	278000000
1974	292000000
1975	184000000
1976	415000000
1977	58000000
1978	157000000
1979	138000000
1980	147000000
1981	148000000
1982	343000000
1983	140000000
1984	448000000
1985	8000000
1986	171000000
1987	154000000
1988	84000000
1989	140000000
1990	135000000
1991	109000000
1992	170000000
1993	85000000
1994	81000000
1995	332000000
1996	164000000
1997	285000000
1998	88000000
1999	207000000
2000	226000000
2001	60000000
2002	74000000
2003	187000000
2004	70000000
2005	446000000
2006	1093000000
2007	655000000
2008	391000000
2009	328000000
2010	473000000
2011	327000000
2012	62000000
2013	55000000
2014	140000000
2015	145000000
2016	40000000
2017	49000000
2018	73000000
2019	33000000
2020	295000000
2021	57000000
2022	212000000