Year	US Dollars adjusted for inflation)
1960	9000000
1961	15000000
1962	19000000
1963	8000000
1964	36000000
1965	5000000
1966	5000000
1967	2000000
1968	16000000
1969	177000000
1970	598000000
1971	87000000
1972	69000000
1973	23000000
1974	3000000
1977	26000000
1978	208000000
1979	4000000
1980	3000000
1981	209000000
1982	90000000
1983	25000000
1984	106000000
1985	65000000
1986	9000000
1987	122000000
1988	77000000
1989	16000000
1990	4000000
1991	46000000
1992	6000000
1995	3000000
1996	27000000
1997	63000000
1999	36000000
2001	106000000
2002	49000000
2003	204000000
2004	293000000
2005	132000000
2006	69000000
2007	33000000
2008	128000000
2009	88000000
2010	182000000
2011	173000000
2012	94000000
2013	130000000
2014	61000000
2015	123000000
2016	109000000
2017	68000000
2018	33000000
2019	18000000