Year	US Dollars adjusted for inflation)
1960	84000000
1961	107000000
1962	127000000
1963	137000000
1964	141000000
1965	171000000
1966	407000000
1967	327000000
1968	760000000
1969	1305000000
1970	1234000000
1971	1753000000
1972	1434000000
1973	2091000000
1974	2912000000
1975	5272000000
1976	4570000000
1977	5626000000
1978	3784000000
1979	533000000
1980	278000000
1981	487000000
1982	541000000
1983	509000000
1984	465000000
1985	548000000
1986	803000000
1987	833000000
1988	478000000
1989	192000000
1990	454000000
1991	1022000000
1992	432000000
1993	985000000
1994	446000000
1995	290000000
1996	611000000
1997	174000000
1998	377000000
1999	319000000
2000	414000000
2001	522000000
2002	433000000
2003	280000000
2004	119000000
2005	55000000
2006	421000000
2007	329000000
2008	60000000
2009	95000000
2010	95000000
2011	94000000
2012	40000000
2013	13000000
2014	13000000
2015	13000000
2016	413000000
2017	3000000
2018	3000000
2019	3000000
2020	2000000