Year	current US$
2000	65831700
2001	61002800
2002	32829100
2003	32185600
2004	97560800
2005	106253500
2006	104595400
2007	186861600
2008	316310200
2009	278542500
2010	284452600
2011	364324100
2012	420465400
2013	587401800
2014	524031200
2015	535747800
2016	522600000
2017	532292700
2018	542000000