Year	current US$
1995	137000000
1996	100000000
1997	86000000
1998	84000000
1999	91000000
2000	84000000
2001	225000000
2002	194000000
2003	194000000
2004	214000000
2005	274000000
2007	229000000
2008	381000000
2009	360000000
2010	376000000
2011	543000000
2012	314000000
2013	278000000
2014	397000000
2015	232000000