Year	US Dollars adjusted for inflation)
1967	4000000
1968	3000000
1972	2000000
1976	0
1977	13000000
1981	33000000
1984	6000000
1985	4000000
1993	12000000
1996	1000000
2006	18000000
2010	1000000
2011	62000000
2015	3000000
2016	5000000