Year	current US$
2002	24209818462.9274
2003	27812613330.0369
2004	36380884841.6274
2005	37732909422.2108
2006	40632173447.2174
2007	51005071518.8002
2008	44854482760.3603
2009	26693595636.2571
2010	29231001992.0237
2011	21496740809.6545
2012	25644305534.0642
2013	24650772055.062
2014	28322996601.0163
2015	27919130279.1481
2016	28866399620.6408
2017	32611569243.8443
2018	31364417774.5201
2019	34172270570.9214
2020	27797307592.8732
2021	41284643864.5953