Year	current US$
1995	17000000
1996	10000000
1997	19000000
1998	23000000
1999	15000000
2000	20000000
2001	15000000
2002	18000000
2003	15000000
2004	10000000
2005	9000000
2007	25000000
2008	26000000
2009	26000000
2010	86000000
2011	20000000
2012	34000000
2013	61000000
2014	43500000
2015	25000000