Year	US Dollars adjusted for inflation)
1960	31000000
1961	157000000
1962	28000000
1963	41000000
1964	45000000
1965	63000000
1966	241000000
1967	283000000
1968	373000000
1969	338000000
1970	370000000
1971	177000000
1972	16000000
1973	16000000
1974	117000000
1975	326000000
1976	64000000
1977	94000000
1978	128000000
1979	5000000
1980	36000000
1981	57000000
1982	184000000
1983	12000000
1984	109000000
1985	154000000
1986	5000000
1987	9000000
1988	90000000
1989	135000000
1990	70000000
1991	1012000000
1992	19000000
1993	350000000
1994	453000000
1995	20000000
1996	8000000
1997	0
1998	16000000
1999	3000000
2000	2000000
2001	19000000
2003	29000000
2004	70000000
2005	158000000
2006	220000000
2007	60000000
2008	144000000
2009	370000000
2010	892000000
2011	165000000
2012	42000000
2013	11000000
2014	3000000
2015	1000000
2016	21000000
2017	8000000
2018	19000000
2019	44000000
2020	45000000
2021	6000000