Year	constant 2015 US$
2000	15019958569.805796
2001	15255451307.528921
2002	15583040331.36783
2003	16665015557.511448
2004	17846940773.284412
2005	19292605704.442543
2006	20604397705.708336
2007	22438584137.749454
2008	23271540264.69616
2009	22373013442.68685
2010	23447100960.48072
2011	22605433478.123676
2012	26410644299.60069
2013	27680379875.104576
2014	28548774894.12161
2015	29314738297.87234
2016	30367743549.69794
2017	31459799082.025665
2018	32205193548.117905
2019	32796313438.519882
2020	30992151258.767773
2021	32022902305.636528