Year	constant 2015 US$
2002	18991252693.335876
2003	20552333664.72809
2004	21366206075.964485
2005	22440926241.618504
2006	23879389616.896816
2007	25307377118.018486
2008	27374989826.943996
2009	30199528535.791656
2010	31381669540.983448
2011	34597796270.54137
2012	38003497347.176704
2013	41145110032.95586
2014	46359740983.15364
2015	47731428885.51364
2016	50544717387.97113
2017	52010514196.00422
2018	50235389978.9553
2019	47134800439.85874
2020	41917877862.32057
2021	43606402580.44758
2022	45952132323.52208
2023	48239205722.00713