Year	US Dollars adjusted for inflation)
1960	38000000
1962	25000000
1963	55000000
1964	67000000
1965	65000000
1966	80000000
1967	140000000
1968	65000000
1969	53000000
1971	4000000
1972	29000000
1973	10000000
1975	8000000
1976	8000000
1977	8000000
1978	87000000
1979	153000000
1980	152000000
1981	268000000
1982	66000000
1983	35000000
1985	42000000
1986	29000000
1987	54000000
1988	34000000
1989	127000000
1990	85000000
1991	170000000
1992	82000000
1993	51000000
1994	64000000
1995	21000000
1996	4000000
1997	19000000
1998	3000000
1999	5000000
2000	3000000
2001	42000000
2002	92000000
2003	101000000
2004	66000000
2005	6000000
2006	17000000
2007	58000000
2008	108000000
2009	151000000
2010	159000000
2011	150000000
2012	169000000
2013	173000000
2014	163000000
2015	217000000
2016	129000000
2017	146000000
2018	59000000
2019	31000000
2020	72000000
2021	119000000
2022	88000000