Year	US Dollars adjusted for inflation)
1961	2000000
1962	4000000
1969	26000000
1970	17000000
1971	36000000
1972	6000000
1973	72000000
1974	92000000
1975	131000000
1976	113000000
1977	62000000
1978	21000000
1979	22000000
1980	15000000
1981	17000000
1982	26000000
1983	31000000
1984	62000000
1985	10000000
1986	57000000
1987	89000000
1988	18000000
1989	18000000
1990	168000000
1991	90000000
1993	30000000
1994	36000000
1995	36000000
1996	16000000
1997	20000000
1998	4000000
2001	43000000
2002	47000000
2003	44000000
2004	2000000
2005	49000000
2006	26000000
2007	52000000
2008	56000000
2009	84000000
2010	137000000
2011	143000000
2012	45000000
2013	54000000
2014	97000000
2015	87000000
2016	135000000
2017	100000000
2018	39000000
2019	104000000
2020	413000000
2021	188000000
2022	33000000