Year	constant 2010 US$
1991	3703.69669378243
1992	3758.28898171098
1993	3804.40061761853
1994	3849.44961982203
1995	3869.26225284803
1996	3957.18657559609
1997	4115.75429569143
1998	4237.77685138049
1999	4319.58483345519
2000	4159.92505816522
2001	4350.23756950873
2002	4310.89036979547
2003	3806.6701633954
2004	3781.76304851776
2005	3827.07098878158
2006	3768.77866168888
2007	3814.75762159944
2008	3606.82877780442
2009	3670.75397673073
2010	3761.88600208918
2011	3840.25902574017
2012	3932.11806430169
2013	4135.9131370404
2014	4333.22879296883
2015	4723.52384024395
2016	4622.88072377012
2017	4906.18530934966
2018	5052.55013662952