Year	US Dollars adjusted for inflation)
1960	92000000
1961	132000000
1962	188000000
1963	573000000
1964	648000000
1965	512000000
1966	106000000
1967	39000000
1968	220000000
1969	240000000
1970	514000000
1971	499000000
1972	492000000
1973	580000000
1974	113000000
1975	130000000
1976	184000000
1977	187000000
1978	412000000
1979	792000000
1980	577000000
1981	521000000
1982	438000000
1983	583000000
1984	575000000
1985	287000000
1986	91000000
1987	91000000
1988	407000000
1989	203000000
1990	314000000
1991	125000000
1992	48000000
1993	73000000
1994	47000000
1995	16000000
1996	3000000
1997	50000000
1998	55000000
1999	58000000
2000	35000000
2001	29000000
2002	48000000
2003	21000000
2004	15000000
2005	3000000
2006	15000000
2007	171000000
2008	191000000
2009	86000000
2010	35000000
2011	23000000
2012	29000000
2013	45000000
2014	100000000
2015	55000000
2016	4000000
2017	7000000
2018	1000000
2019	9000000
2020	90000000
2021	255000000
2022	158000000