Year	constant 2010 US$
1970	11534.8454375365
1971	11875.3442629897
1972	12333.0098425657
1973	12955.3227537683
1974	13153.9582008435
1975	12959.4798657559
1976	13450.2730387701
1977	13739.4003578983
1978	14070.0980726612
1979	14491.139596631
1980	14616.3950258881
1981	14594.0323062119
1982	14644.9585447964
1983	14841.1190362952
1984	15147.3386705718
1985	15474.1245355351
1986	15806.407370277
1987	16188.0234499356
1988	16763.2542319567
1989	17258.0027570485
1990	17566.9024816704
1991	17562.2308241788
1992	17383.5204831377
1993	17178.5027799707
1994	17325.0314596372
1995	17666.2162452992
1996	17948.8783171015
1997	18461.280923515
1998	18902.2016505808
1999	19427.5903455747
2000	20236.8287889901
2001	20664.8470708428
2002	20989.5398704396
2003	21320.8174626116
2004	21951.0617664025
2005	22491.7278116393
2006	23311.0188435042
2007	24096.5655190429
2008	24251.4327465742
2009	23073.7780783766
2010	23572.5752688162
2011	24062.1089991546
2012	24039.9955253102
2013	24139.5621659778
2014	24470.0752956046
2015	24847.61580439
2016	25201.9686596438
2017	25772.3349654211
2018	26221.2458827224