Year	current US$
2000	940079500
2001	882854300
2002	819652300
2003	746543600
2004	2289645900
2005	2393205100
2006	2375033400
2007	3589404000
2008	3630399500
2009	3176783400
2010	3466445700
2011	4140220000
2012	4254041300
2013	4963451000
2014	5662479900
2015	5943520000
2016	5862168000
2017	5730539800
2018	5479476700