Year	current US$
1995	1714000000
1996	2233000000
1997	755000000
1998	891000000
1999	1039000000
2000	1058000000
2001	1108000000
2002	981000000
2003	859000000
2004	1077000000
2005	1276000000
2006	1229000000
2007	1542000000
2008	1810000000
2009	1895000000
2010	2013000000
2011	2584000000
2012	2637000000
2013	3230000000
2014	2428000000
2015	2101000000
2016	1812000000