Year	current US$
2005	8738148168.123665
2006	13249082473.2638
2007	17138333672.683912
2008	22373816009.18099
2009	16675274712.56244
2010	18907394936.2207
2011	20468480889.748997
2012	17974213129.20815
2013	17144777886.053425
2014	17412888832.018253
2015	17172039845.39517
2016	12484394138.964096
2017	18217206713.73733
2018	22013232130.1525
2019	25977240955.375553