Year	current US$
2000	4918108329.46664
2001	6427184893.8671
2002	7707405852.3475
2003	11397198194.108
2004	12069505118.3827
2005	10057341822.7672
2006	8032711214.21752
2007	11882289858.4076
2008	5135109391.26902
2009	8970628525.44024
2010	11427955026.1426
2011	14130603501.7823
2012	15615740571.0774
2013	22412819137.3971
2014	23526760323.7474
2015	22493777139.4403
2016	24148134618.7048
2017	27245651140.2795
2018	24090049440.5434
2019	27743297148.1344
2020	23579803878.8605
2021	24272029741.7304