Year	constant 2015 US$
1990	12044685154.23879
1991	12287791549.812
1992	13293392928.918678
1993	14460504869.758911
1994	15442614985.082859
1995	16516994519.327814
1996	16467328304.403772
1997	16926895503.764435
1998	17533334541.02071
1999	17435582362.123306
2000	17352236715.69559
2001	17493252979.29357
2002	17623090258.044575
2003	17589994569.403038
2004	17383792171.567146
2005	18076459128.423706
2006	18741229866.66309
2007	18844600927.605583
2008	18531852828.97031
2009	17794522450.864765
2010	18081713191.728382
2011	18691406335.332634
2012	18880382481.2728
2013	18895973055.908974
2014	19066723032.860302
2015	19824624009.2986
2016	20290754951.99459
2017	20342905708.85674
2018	20400182333.995426
2019	21204685248.075157
2020	19096461679.6932
2021	20529673038.76183