Year	constant 2010 US$
1975	1668.5247358517
1976	2018.19178991995
1977	2094.15991250394
1978	2467.68968375468
1979	2616.53923346019
1980	3015.94278243543
1981	3046.62076378687
1982	3145.69438519327
1983	3078.74591718647
1984	3208.97078920009
1985	3187.56611573314
1986	3280.76703622849
1987	3250.1929782771
1988	3067.78399743962
1989	2543.58777517349
1990	2448.39017203015
1991	2364.03090763901
1992	2652.10891145229
1993	2627.06182307282
1994	2627.48117696806
1995	2681.5075117908
1996	2654.18401670976
1997	2676.55744452355
1998	2703.47924818333
1999	2746.87910880256
2000	2812.77198721841
2001	2907.14042929886
2002	3017.37152156993
2003	3075.5308974405
2004	3251.53150116388
2005	3403.35155646294
2006	3540.09075638119
2007	3668.05547488475
2008	3752.65035522893
2009	3764.78426460065
2010	3656.45367450307
2011	3554.46233506079
2012	3455.80112701204
2013	3374.40881441605
2014	3323.03309599158
2015	3275.27219379511
2016	3241.25076482136
2017	3232.75834375668
2018	3236.94914840657