Year	US Dollars adjusted for inflation)
1973	28000000
1976	1000000
1978	2000000
1980	42000000
1983	1000000
1984	3000000
1987	18000000
1992	1000000
1994	7000000
1995	14000000
1997	16000000
1999	12000000
2006	9000000
2011	2000000
2012	0
2013	1000000
2015	1000000
2016	2000000