Year	current US$
1995	1852000000
1996	2336000000
1997	1168000000
1998	1319000000
1999	1483000000
2000	1647000000
2001	1718000000
2002	1546000000
2003	1311000000
2004	1604000000
2005	1843000000
2006	1807000000
2007	2292000000
2008	2745000000
2009	3019000000
2010	2944000000
2011	3994000000
2012	4592000000
2013	5417000000
2014	4118000000
2015	3249000000
2016	2920000000