Year	constant 2015 US$
2002	18157734666.706985
2003	19096751500.3976
2004	20525648957.63579
2005	22293307237.31996
2006	24214507296.336975
2007	25571224359.960564
2008	28874544286.52981
2009	31464590911.318607
2010	33499808878.242157
2011	36612012031.61954
2012	38939253508.821236
2013	41740610686.61841
2014	45941782592.33526
2015	44035457377.11074
2016	41864142806.60351
2017	42504407768.81063
2018	43098600145.47553
2019	43977722668.35314
2020	42251368490.40295
2021	44742174845.12104
2022	46624808672.99877
2023	47345484694.660065