Year	US Dollars adjusted for inflation)
1960	21000000
1961	30000000
1962	109000000
1963	60000000
1964	38000000
1965	11000000
1966	21000000
1967	14000000
1970	82000000
1971	48000000
1972	15000000
1973	158000000
1974	61000000
1975	104000000
1976	69000000
1977	39000000
1978	68000000
1979	62000000
1980	75000000
1981	115000000
1982	343000000
1983	116000000
1985	8000000
1986	143000000
1987	154000000
1988	97000000
1989	63000000
1990	34000000
1991	40000000
1992	19000000
1993	160000000
1994	134000000
1995	53000000
1996	92000000
1997	485000000
1998	19000000
1999	130000000
2000	215000000
2001	149000000
2002	96000000
2003	20000000
2004	327000000
2005	33000000
2006	75000000
2008	23000000
2009	59000000
2010	109000000
2011	224000000
2012	252000000
2013	51000000
2014	84000000
2015	318000000
2016	315000000
2017	209000000
2018	15000000
2020	242000000
2021	3000000