Year	current US$
1995	52000000
1996	78000000
1997	65000000
1998	54000000
1999	63000000
2000	50000000
2001	65000000
2002	70000000
2003	78000000
2004	103000000
2005	112000000
2006	132000000
2007	91000000
2008	84000000
2009	378000000
2010	211000000
2011	223000000
2012	173000000
2013	204000000
2014	257000000
2015	324000000
2016	251000000