Year	US Dollars adjusted for inflation)
1960	67000000
1961	300000000
1962	188000000
1963	213000000
1964	253000000
1965	111000000
1966	92000000
1967	58000000
1968	193000000
1969	163000000
1970	188000000
1971	285000000
1972	318000000
1973	113000000
1974	113000000
1975	82000000
1976	259000000
1977	138000000
1978	179000000
1979	167000000
1980	136000000
1981	109000000
1982	240000000
1983	99000000
1984	78000000
1985	84000000
1986	237000000
1987	246000000
1988	125000000
1989	34000000
1990	79000000
1991	93000000
1992	139000000
1993	144000000
1994	164000000
1995	254000000
1996	146000000
1997	96000000
1998	37000000
1999	78000000
2000	67000000
2001	112000000
2002	159000000
2003	306000000
2004	309000000
2005	218000000
2006	216000000
2007	314000000
2008	219000000
2009	165000000
2010	219000000
2011	291000000
2012	248000000
2013	160000000
2014	173000000
2015	321000000
2016	94000000
2017	63000000
2018	115000000
2019	221000000
2020	110000000
2021	118000000
2022	171000000