Year	constant 2015 US$
2000	12982475709.5679
2001	13226186122.662128
2002	13651923402.439587
2003	14110177524.83509
2004	14172635937.4045
2005	14340591903.734144
2006	15017685476.185719
2007	15475515806.742016
2008	15969675192.949345
2009	14944128127.627687
2010	15821840375.720709
2011	16538365013.02225
2012	16818883239.469679
2013	17069797431.80324
2014	17510945234.348637
2015	18003891796.945812
2016	18557894525.646843
2017	19251173556.567757
2018	19954558454.871346
2019	20586576182.58994
2020	19897850660.61915
2021	20849373089.49147
2022	21452006422.1901
2023	21202403438.898586