Year	US Dollars adjusted for inflation)
1960	35000000
1961	108000000
1962	65000000
1963	45000000
1964	93000000
1965	39000000
1966	139000000
1967	95000000
1968	351000000
1969	113000000
1970	5000000
1971	161000000
1972	133000000
1973	206000000
1974	83000000
1975	148000000
1976	293000000
1977	448000000
1978	235000000
1979	243000000
1980	612000000
1981	801000000
1982	661000000
1983	457000000
1984	364000000
1985	180000000
1986	356000000
1987	505000000
1988	776000000
1989	558000000
1990	416000000
1991	455000000
1992	366000000
1993	458000000
1994	628000000
1995	458000000
1996	484000000
1997	608000000
1998	620000000
1999	355000000
2000	281000000
2001	199000000
2002	233000000
2003	331000000
2004	202000000
2005	504000000
2006	1143000000
2007	1219000000
2008	452000000
2009	500000000
2010	366000000
2011	541000000
2012	869000000
2013	384000000
2014	638000000
2015	469000000
2016	484000000
2017	1067000000
2018	466000000
2019	301000000
2020	462000000
2021	347000000
2022	295000000