Year	constant 2010 US$
1991	3829.72528597064
1992	3824.67264001513
1993	3786.77019607636
1994	3903.03453039703
1995	4040.42206469974
1996	4205.44228918811
1997	4100.45329389755
1998	4360.04331277078
1999	4365.53318692441
2000	4511.01068672564
2001	4542.66106162424
2002	4608.60978549854
2003	4807.45197901486
2004	4762.2331701027
2005	4935.48514406058
2006	5188.0802436228
2007	5566.15294133245
2008	5727.71189151269
2009	5411.4613700265
2010	5836.64576362642
2011	5983.86272162032
2012	6321.48616563858
2013	6770.32085888104
2014	6964.16064331984
2015	6856.86243065619
2016	6756.06416149686
2017	7177.58840181349
2018	7189.53800587273