Year	constant 2010 US$
1978	3541.36850129854
1979	3373.92583341335
1980	2757.48329561855
1981	2653.2115820625
1982	3021.36180820341
1983	3093.21830451346
1984	2940.92375025536
1985	2936.35330761932
1986	2751.9105973237
1987	2741.58501589085
1988	2620.2784600512
1989	2665.88054403255
1990	2788.75431133861
1991	2919.07529448895
1992	2947.54285514955
1993	2916.67120204464
1994	2870.99148934364
1995	2898.16381601366
1996	2976.45164751106
1997	2983.4723212939
1998	3060.23350344021
1999	3057.88667369564
2000	3159.76730838028
2001	3198.10796254982
2002	3301.80952877076
2003	3449.26412498777
2004	3552.23723402696
2005	3616.52890128914
2006	3750.86999841089
2007	3970.13122745205
2008	4021.91590209151
2009	4034.91703026495
2010	4149.98651546335
2011	4163.51379102198
2012	4015.5679876073
2013	4000.28127402487
2014	4067.05210047457
2015	4061.00036714648
2016	4318.66082420116
2017	4378.24307569979