Year	constant 2010 US$
1968	2647.60917841718
1969	2725.78027612247
1970	2811.31722719193
1971	2912.59897098141
1972	3063.19120754906
1973	3203.52132784059
1974	3332.7423696246
1975	3304.33644809062
1976	3386.01311933797
1977	3471.90403206086
1978	3689.6152992939
1979	3819.62647814548
1980	3900.58271218425
1981	3880.68239814907
1982	3788.85922644697
1983	3742.03281707004
1984	3747.96569031711
1985	3759.40191725703
1986	3882.84095379848
1987	3997.90749303175
1988	4122.43518972576
1989	4121.37777877059
1990	4263.37434399297
1991	4287.64338176756
1992	4393.18855184313
1993	4582.1818825039
1994	4804.97194876132
1995	4967.75883885342
1996	4960.5400631328
1997	5039.27707180886
1998	5007.79716544105
1999	4725.56847670351
2000	4760.25042838614
2001	4752.1044363348
2002	4787.26692990309
2003	4867.2637222539
2004	5050.11439782362
2005	5266.07336083751
2006	5543.66376342922
2007	5825.37437233469
2008	5913.83132767796
2009	5943.44774378576
2010	6094.62504762527
2011	6431.48938447533
2012	6654.79892281602
2013	6918.48467641361
2014	7216.93139088105
2015	7469.48320146758
2016	7548.1690149812
2017	7476.37691835218
2018	7437.51928383763