Year	US Dollars adjusted for inflation)
1960	14000000
1961	17000000
1962	2000000
1963	3000000
1964	15000000
1965	9000000
1966	26000000
1967	12000000
1968	57000000
1969	155000000
1970	371000000
1971	540000000
1972	534000000
1973	733000000
1974	1767000000
1975	1637000000
1976	1875000000
1977	3056000000
1978	4214000000
1979	3166000000
1980	2941000000
1981	3172000000
1982	2768000000
1983	1410000000
1984	731000000
1985	750000000
1986	401000000
1987	184000000
1988	9000000
1989	218000000
1990	11000000
1999	9000000
2005	1000000
2006	16000000
2007	16000000
2008	16000000
2009	22000000
2010	37000000
2011	8000000
2012	73000000
2013	116000000