Year	US Dollars adjusted for inflation)
1980	23000000
1981	11000000
1995	3000000
1996	3000000
1997	0
1998	3000000
1999	44000000
2000	20000000
2001	5000000
2002	27000000
2003	43000000
2004	28000000
2005	23000000
2006	65000000
2007	83000000
2008	118000000
2009	64000000
2010	70000000
2011	90000000
2012	141000000
2013	138000000
2014	154000000
2015	223000000
2016	242000000
2017	179000000
2018	249000000
2019	248000000
2020	251000000
2021	438000000
2022	398000000