Year	constant 2015 US$
1990	2890.539839925767
1991	2854.5362273714327
1992	2574.8378148793304
1993	2373.9033934703107
1994	2098.63564378197
1995	1886.487655007038
1996	1945.8494987472372
1997	2176.7041542260636
1998	2370.1993190257595
1999	2461.8402014150915
2000	2616.9271820746153
2001	2754.6794075515886
2002	2912.1391533393016
2003	3139.1380084590037
2004	3522.508950519237
2005	3880.0354099342358
2006	4294.2519544298375
2007	4685.005695108581
2008	5180.740438147109
2009	5203.883102807007
2010	5621.967658331608
2011	5938.252882200918
2012	6047.90392508586
2013	6110.937801191595
2014	6212.935779480995
2015	5967.068560342268
2016	5811.2505397285495
2017	5964.914362877616
2018	6165.957886710484
2019	6267.765139320414
2020	6252.008819139122
2021	6457.751269908336
2022	6206.648854855598
2023	6482.820332738967