Year	constant 2015 US$
1995	899.4415628334549
1996	964.2827727147902
1997	1039.4655272266757
1998	1086.781967303198
1999	1132.9666482513421
2000	1136.4312845893353
2001	1245.0091714022042
2002	1441.997966195516
2003	1739.812658125424
2004	1931.1730037870311
2005	2231.867570665561
2006	2575.874463900024
2007	3033.011229464063
2008	3337.7198126846233
2009	2621.79231758817
2010	2679.75887026503
2011	2768.0334686956708
2012	3145.708312982225
2013	3269.149226433946
2014	3322.55513026505
2015	3288.584087190859
2016	3254.839565139611
2017	3609.448599995125
2018	3779.0466611797137
2019	4019.1862613301537
2020	3672.4575422693083
2021	3780.417129621306