Year	constant 2015 US$
1990	5017.161389856369
1991	4407.152765274751
1992	4057.25835086292
1993	4124.897659873076
1994	4293.323332026128
1995	4570.185131270187
1996	4762.4767009599955
1997	4544.606230115883
1998	4461.5842739612535
1999	4451.762071424667
2000	4567.239676944579
2001	4873.092813670752
2002	5246.170436895755
2003	5407.8555129112865
2004	6005.916376652383
2005	6325.221287913036
2006	6873.660722768077
2007	7480.58078560976
2008	8314.232335403425
2009	7921.22001948902
2010	7657.542379219832
2011	8042.90341965965
2012	8234.304601700685
2013	8287.249657049138
2014	8661.12203485529
2015	8976.9544892648
2016	9286.596151270438
2017	10106.017607198755
2018	10778.44835128264
2019	11252.88561529592
2020	10898.921421422165
2021	11607.402595794834
2022	12131.736253190755
2023	12386.461442117674