Year	US Dollars adjusted for inflation)
1960	64000000
1961	32000000
1962	32000000
1963	34000000
1964	2000000
1966	69000000
1967	216000000
1968	20000000
1969	8000000
1970	15000000
1971	130000000
1972	165000000
1973	395000000
1974	252000000
1975	230000000
1976	170000000
1977	213000000
1978	59000000
1979	14000000
1980	367000000
1981	917000000
1982	701000000
1983	242000000
1984	231000000
1985	517000000
1986	92000000
1987	73000000
1988	105000000
1989	120000000
1990	190000000
1991	320000000
1992	73000000
1993	38000000
1994	1000000
1995	5000000
1996	35000000
1997	37000000
1998	8000000
1999	85000000
2000	106000000
2001	106000000
2002	44000000
2003	15000000
2004	9000000
2005	21000000
2006	377000000
2007	771000000
2008	737000000
2009	358000000
2010	208000000
2011	596000000
2012	687000000
2013	993000000
2014	181000000
2015	125000000
2016	95000000
2018	14000000
2020	79000000