Year	US Dollars adjusted for inflation)
1972	0
1973	0
1975	26000000
1976	4000000
1978	8000000
1979	395000000
1980	95000000
1981	107000000
1982	168000000
1983	14000000
1984	54000000
1985	33000000
1986	10000000
1987	14000000
1988	64000000
1989	7000000
1990	36000000
1994	3000000
1997	3000000
1998	10000000
2002	21000000
2003	16000000
2004	113000000
2005	113000000
2006	18000000
2007	9000000
2008	17000000
2009	32000000
2010	27000000
2011	0