Year	constant 2015 US$
2001	16063869941.068657
2002	16297615110.335873
2003	16976871370.068382
2004	17594579614.88689
2005	18477441436.64862
2006	19372928822.381283
2007	20104135872.968876
2008	21208811406.774345
2009	22594884776.421597
2010	25041531141.1438
2011	25427075695.51458
2012	26244548578.919674
2013	27184590812.138977
2014	28892664464.896103
2015	30122661401.21474
2016	30133460897.943146
2017	34585845228.3914
2018	37282729604.574875
2019	40720862673.05572
2020	38069359837.54706
2021	43133627673.66786
2022	46789637712.83054
2023	44451753120.71919