Year	current US$
2001	8733832539.142275
2002	6517631041.524847
2003	11870388019.060585
2004	15540550034.03676
2005	28208386657.5902
2006	39503262083.0497
2007	20556024506.466984
2008	29093805309.734516
2009	14819060585.432268
2010	59717358747.44724
2011	99894894486.04494
2012	135765282505.10551
2013	139735057862.4915
2014	123478284547.3111
2015	94976174268.20967
2016	90183798502.38258
2017	93260721579.30565
2018	111327433628.31859
2019	108446482722.94078
2020	88351313900.61267