Year	constant 2015 US$
1995	1830.598140439382
1996	1913.9478140201118
1997	1992.4203427221837
1998	2045.84386117497
1999	2093.3152840768817
2000	2171.95824103667
2001	2228.2710121017903
2002	2298.071975634552
2003	2406.9033203478525
2004	2547.693291470408
2005	2695.7495337513274
2006	2901.0847369497756
2007	3139.1019573637955
2008	3300.6686592315705
2009	3385.4393560629183
2010	3600.3244519203254
2011	3843.8349087057504
2012	4001.8837830885973
2013	4143.965378123781
2014	4305.474445374223
2015	4424.3217219314
2016	4564.75548191685
2017	4749.650542027879
2018	4913.861576436037
2019	5056.9244488670865
2020	4927.546880948587
2021	5239.292941445393
2022	5382.523505214738