Year	US Dollars adjusted for inflation)
1968	1000000
1971	7000000
1972	2000000
1973	21000000
1974	24000000
1975	31000000
1978	27000000
1979	22000000
1982	2000000
1987	0
1988	1000000
1989	0
1990	7000000
1991	0
1992	3000000
1993	9000000
1994	2000000
1995	2000000
1996	0
1997	0
1998	0
1999	0
2000	21000000
2001	2000000
2002	0
2003	4000000
2004	31000000
2005	19000000
2006	33000000
2007	23000000
2008	15000000
2009	27000000
2010	5000000
2011	3000000
2013	18000000
2014	40000000
2015	42000000
2016	49000000
2017	56000000
2018	47000000
2019	18000000
2020	151000000
2021	33000000
2022	11000000