Year	constant 2010 US$
1970	2143.68670682911
1971	2285.86129971775
1972	2353.64766249159
1973	2393.29416161717
1974	2377.78533466937
1975	2554.0149960343
1976	2659.5565592548
1977	2860.59601612744
1978	3024.65216982004
1979	3031.66322425028
1980	2861.87001861085
1981	3381.65587454335
1982	3661.10352321439
1983	3840.72531795522
1984	4123.11548672998
1985	4232.17771254103
1986	4006.27373512707
1987	3928.20843500301
1988	4076.49150795857
1989	4069.93419744637
1990	4013.34505046951
1991	3585.39388142974
1992	2975.57999131289
1993	2598.50571300299
1994	2624.58815724128
1995	2561.30911445027
1996	2727.13887670401
1997	2775.6167059067
1998	2731.97316613693
1999	2859.93971595184
2000	2919.09281071919
2001	3026.43888252545
2002	3088.48278232656
2003	3259.61745167784
2004	3431.7696749636
2005	3739.72170507853
2006	4255.77236306495
2007	4412.2498052442
2008	4317.07003947414
2009	4479.95653008696
2010	4815.75677566225
2011	4818.51523363817
2012	5058.98764380885
2013	5193.58222241288
2014	5336.49301762559
2015	5626.86570363889