Year	constant 2015 US$
1995	19631771319.322956
1996	21068971332.714424
1997	19574283318.787296
1998	18276793037.017174
1999	17918512403.90484
2000	19418263663.39746
2001	21580493557.27801
2002	22875833079.869873
2003	24172696056.87967
2004	26374042883.31488
2005	27336821267.967804
2006	29581945005.177254
2007	29439457209.61732
2008	34189991352.088924
2009	32167784842.20988
2010	32493804087.648273
2011	35976555309.49952
2012	31213564686.78714
2013	31054901389.907352
2014	34242147262.161816
2015	35947071985.76417
2016	36400030830.202965
2017	39442414110.304825
2018	41985193956.289314
2019	41320833407.6204
2020	37990965317.35736
2021	40058472192.428566
2022	40174120305.74309
2023	38404583191.82708