Year	constant 2015 US$
1991	9218.748861575696
1992	9340.27107284005
1993	9507.468166840843
1994	9410.616638859603
1995	9209.803812006348
1996	9334.825816531928
1997	9597.36334102392
1998	9676.09769645669
1999	9891.57246090846
2000	10168.60822861707
2001	10382.983309589654
2002	10623.27298055064
2003	10850.122900606884
2004	11155.859289881771
2005	11701.563762010086
2006	12328.44261365549
2007	13332.257423897265
2008	13865.89039432765
2009	14110.35457417849
2010	14894.410714913767
2011	15476.180227542036
2012	16094.800523881902
2013	16331.589911464673
2014	16591.949078532914
2015	16904.780533351408
2016	17487.378216251196
2017	18279.89647136693
2018	19041.51693226624
2019	19627.73218328783
2020	20086.179478880204
2021	20983.643431959663
2022	21389.02709217023