Year	current US$
1995	25000000
1996	12000000
1997	4000000
1998	3000000
1999	2000000
2000	14000000
2001	12000000
2002	14000000
2003	15000000
2004	23000000
2005	60000000
2006	125000000
2007	104000000
2008	144000000
2009	62000000
2010	20000000
2011	31000000
2012	25000000
2013	34000000
2014	38000000
2015	29000000
2016	28000000
2017	24000000
2018	23000000