Year	constant 2015 US$
1994	854.1364309193524
1995	956.1771721008615
1996	1020.9963791044486
1997	1098.0981290382936
1998	1155.6477823415485
1999	1205.2599496923292
2000	1290.5026574422861
2001	1428.6720713110342
2002	1640.031240059035
2003	1881.7345267220624
2004	2107.456976113593
2005	2416.436602752029
2006	2767.70719506595
2007	3193.443876194038
2008	3456.8248495277353
2009	2928.678179652301
2010	3034.1551742024244
2011	3153.7982954276185
2012	3417.0803924694987
2013	3614.2012925198424
2014	3700.7487460363864
2015	3814.9670363414984
2016	3779.19818716737
2017	4128.445866087231
2018	4290.803272459714
2019	4629.635742823255
2020	4202.378923086488
2021	4407.853430770198
2022	4909.933538441295
2023	5433.335023032387