Year	constant 2015 US$
1994	66020000
1995	109030000
1996	77210000
1997	125040000
1998	147290000
1999	1043760000
2000	1716180000
2001	1978230000
2002	2804990000
2003	1580310000
2004	1289270000
2005	1138120000
2006	1621800000
2007	801420000
2008	859240000
2009	558080000
2010	606340000
2011	1166550000
2012	977790000
2013	665020000
2014	314980000
2015	312870000
2016	633470000
2017	1654910000