Year	current US$
2000	340309200
2001	284650900
2002	285321400
2003	268255100
2004	1999212000
2005	2004978000
2006	2178607000
2007	3245648000
2008	2498014000
2009	1678663000
2010	1850843000
2011	2265159000
2012	2428596000
2013	2957004000
2014	3412388000
2015	3385051000
2016	3286342000
2017	3242931000
2018	3079000000