Year	constant 2015 US$
1997	271204183.92180216
1998	238666081.6987335
1999	269667618.3959455
2000	255875427.96255356
2001	264335974.53300047
2002	264869312.31559116
2003	275818425.6276725
2004	279107453.5946377
2005	324205082.6117195
2006	324391747.2424065
2007	324901646.6115746
2008	343420813.44528633
2009	359176993.7323415
2010	367944901.42048573
2011	397263952.9809066
2012	396466128.63339007
2013	415479279.8771025
2014	380549601.59425676
2015	405152673.41682404
2016	431074014.3710756
2017	448577681.5404893
2018	438510163.27198416
2019	461765220.34920895
2020	476541653.27425575
2021	502275244.2222481
2022	532914015.5139487
2023	572882778.1076821