Year	current US$
2000	808697000
2001	585352500
2002	544847200
2003	536348400
2004	2001234000
2005	2102328000
2006	2052744000
2007	3135440600
2008	2977494500
2009	2554283300
2010	2793289500
2011	3309376700
2012	3304223400
2013	3779382600
2014	4525579500
2015	4767374000
2016	4681248000
2017	4525184000
2018	4341000000