Year	US Dollars adjusted for inflation)
1960	1000000
1963	1000000
1964	1000000
1965	1000000
1966	2000000
1967	7000000
1968	5000000
1969	36000000
1970	26000000
1971	60000000
1972	11000000
1973	71000000
1974	67000000
1975	181000000
1976	150000000
1977	250000000
1978	81000000
1979	43000000
1980	12000000
1981	72000000
1982	182000000
1983	356000000
1984	120000000
1985	88000000
1986	49000000
1987	40000000
1988	19000000
1989	119000000
1990	60000000
1993	55000000
1994	145000000
1995	278000000
1996	286000000
1997	158000000
1998	22000000
2000	118000000
2001	32000000
2002	39000000
2003	37000000
2004	49000000
2005	178000000
2006	296000000
2007	12000000
2008	72000000
2009	94000000
2010	31000000
2011	21000000
2012	122000000
2013	492000000
2014	719000000
2015	151000000
2016	447000000
2017	782000000
2018	282000000
2019	86000000
2020	85000000
2021	4000000
2022	5000000