Year	US Dollars adjusted for inflation)
1960	13000000
1962	232000000
1963	518000000
1964	301000000
1965	386000000
1966	510000000
1967	299000000
1968	218000000
1969	211000000
1970	510000000
1971	309000000
1972	291000000
1973	369000000
1974	193000000
1975	226000000
1976	415000000
1977	501000000
1978	383000000
1979	126000000
1980	195000000
1981	119000000
1982	47000000
1983	216000000
1984	125000000
1985	26000000
1986	206000000
1987	19000000
1988	5000000
1989	11000000
1990	11000000
1991	26000000
1992	361000000
1993	244000000
1994	239000000
1995	38000000
1996	38000000
1997	11000000
1999	21000000
2000	6000000
2001	18000000
2005	264000000
2006	741000000
2007	914000000
2008	493000000
2009	134000000
2010	178000000
2011	208000000
2012	127000000
2013	1000000
2014	50000000
2015	2000000
2022	30000000