Year	US Dollars adjusted for inflation)
1960	54000000
1961	65000000
1962	38000000
1963	237000000
1964	77000000
1965	81000000
1966	42000000
1967	76000000
1968	23000000
1969	21000000
1970	15000000
1971	4000000
1972	26000000
1973	13000000
1974	172000000
1975	127000000
1976	90000000
1977	30000000
1978	105000000
1979	47000000
1980	328000000
1981	119000000
1982	132000000
1983	112000000
1984	127000000
1985	206000000
1986	100000000
1987	69000000
1988	144000000
1989	85000000
1990	90000000
1991	64000000
1992	442000000
1993	406000000
1994	252000000
1995	195000000
1996	552000000
1997	397000000
1998	560000000
1999	768000000
2000	472000000
2001	7000000
2002	16000000
2003	242000000
2004	67000000
2005	93000000
2006	132000000
2007	141000000
2008	135000000
2009	42000000
2010	52000000
2011	60000000
2012	79000000
2013	298000000
2014	198000000
2015	293000000
2016	161000000
2017	47000000
2018	87000000
2019	86000000
2020	53000000
2021	53000000
2022	34000000