Year	constant 2010 US$
1976	1819.59882886725
1977	2104.12079612843
1978	2450.94448521371
1979	2931.56637959897
1980	3055.45731280106
1981	3023.33211302422
1982	3243.61312435235
1983	3197.68175442591
1984	3367.70035124874
1985	3421.17858570278
1986	3091.42822563304
1987	3152.32822515002
1988	2898.73837531893
1989	2656.13260707764
1990	2298.55317479904
1991	1887.38087972865
1992	2284.59844939223
1993	2138.23817636747
1994	2077.94685992853
1995	1995.2964147593
1996	2094.66700988811
1997	2159.84825278173
1998	2267.75942649852
1999	2284.59300816047
2000	2563.96318342517
2001	2647.19779086479
2002	2571.02773010652
2003	2539.19495116956
2004	2734.1671501864
2005	3030.48394466197
2006	3077.09546275457
2007	3232.43199048525
2008	3341.55484339225
2009	3090.82929795911
2010	2694.45188119211
2011	2740.92158412097
2012	2855.81239898319
2013	2952.58263118724
2014	2798.49991926394
2015	2803.28691594992
2016	2726.06562611337
2017	2767.71889904292
2018	2685.76076820793