Year	current US$
2005	8033650427.382553
2006	13023780390.370924
2007	16535770326.27935
2008	21956576482.785973
2009	15980921549.576065
2010	17709464814.443817
2011	19599420334.0784
2012	19489648009.38282
2013	19267154575.64911
2014	20261016032.66041
2015	21298155319.583588
2016	16375003101.475742
2017	22298467087.153572
2018	27348466314.625397
2019	31831122899.559372