Year	current US$
2003	13828871174.731747
2004	15060587561.949675
2005	15149635306.782413
2006	16665671887.281082
2007	20944911892.06368
2008	24271668711.98414
2009	25304225677.605633
2010	29687531227.74395
2011	28445013571.864162
2012	26903952256.250195
2013	30702564638.558212
2014	32485773829.287796
2015	33726178623.296154
2016	35581693840.60586
2017	38179709327.00391
2018	35968285073.17156
2019	42475887863.352875