Year	current US$
2004	32240551030.1239
2005	43219391711.2953
2006	57156777550.1593
2007	63820416219.4698
2008	94455431928.0781
2009	91184627348.4235
2010	126668102008.4
2011	142697403692.992
2012	155553591348.795
2013	216014810181.104
2014	244990103126.964
2015	188994509109.673
2016	183444108675.475
2017	182883127230.785
2018	169483345719.03