Year	current US$
2004	176493145475.717
2005	204840144765.672
2006	234635802875.821
2007	280897611077.33
2008	332489828466.3
2009	376251240079.811
2010	409235403195.334
2011	447829466345.944
2012	508246549172.732
2013	565452578374.867
2014	600853681605.614
2015	576338752371.974
2016	593745732638.909
2017	637053700205.975
2018	601353995624.012