Year	constant 2015 US$
1995	4446.757290897972
1996	4631.108903900595
1997	4758.626191237909
1998	4769.621963272386
1999	4883.68157760934
2000	5081.634461420692
2001	5201.581249583706
2002	5382.328492177466
2003	5595.953831401669
2004	5867.968333845432
2005	6129.402609884868
2006	6471.4450808101765
2007	6917.16242409627
2008	7117.09158964583
2009	7281.492307081851
2010	7739.554297245245
2011	8070.796198961146
2012	8447.361839304984
2013	8806.648818451386
2014	9204.887182392828
2015	9606.49029868592
2016	9989.703366546131
2017	10449.27455518782
2018	10834.346640792895
2019	11215.832142076335
2020	11178.840402483076
2021	11856.753027571147
2022	12115.249737115764