Year	current US$
1995	14000000
1996	11000000
1997	10000000
1998	9000000
1999	13000000
2000	12000000
2001	22000000
2002	25000000
2003	29000000
2004	22000000
2005	40000000
2006	45000000
2007	27000000
2008	32000000
2009	77000000
2010	27000000
2011	38000000
2012	63000000
2013	52000000
2014	55000000
2015	46000000
2016	41000000