Year	constant 2010 US$
1995	4009.62410599099
1996	4349.78814541805
1997	4665.99028510073
1998	4891.13266266255
1999	5161.16540402343
2000	5365.50212541777
2001	5474.61333365804
2002	5692.58046495798
2003	5786.81584421046
2004	6036.16646516427
2005	6146.04938525206
2006	6445.16128904834
2007	6812.96719227232
2008	7272.17839771406
2009	7528.04309214564
2010	7756.92278073348
2011	7996.87151921607
2012	8056.73980378694
2013	8087.77635159426
2014	8287.72159127278
2015	8541.48195705278
2016	8881.90507579173
2017	9312.7846845787
2018	9721.34061280557