Year	US Dollars adjusted for inflation)
1960	30000000
1961	15000000
1962	55000000
1963	39000000
1964	33000000
1965	55000000
1966	92000000
1967	126000000
1968	48000000
1969	238000000
1970	130000000
1971	68000000
1972	66000000
1973	87000000
1974	184000000
1975	372000000
1976	337000000
1977	464000000
1978	593000000
1979	279000000
1980	384000000
1981	401000000
1982	1061000000
1983	786000000
1984	478000000
1985	292000000
1986	250000000
1987	143000000
1988	247000000
1989	59000000
1990	16000000
1991	24000000
1993	1000000
1994	5000000
1995	19000000
1996	75000000
1997	77000000
1998	248000000
1999	63000000
2000	136000000
2001	160000000
2002	132000000
2003	281000000
2004	169000000
2005	49000000
2006	52000000
2007	183000000
2008	160000000
2009	234000000
2010	89000000
2011	214000000
2012	175000000
2013	75000000
2014	197000000
2015	231000000
2016	231000000
2017	369000000
2018	184000000
2019	229000000
2020	157000000
2021	67000000
2022	32000000