Year	constant 2010 US$
1970	24491.8267514431
1971	24724.0005178948
1972	25818.1469500928
1973	27226.7433982099
1974	27696.0497705729
1975	27683.6075326351
1976	28849.4625726536
1977	29408.0443897119
1978	30085.6658608566
1979	30816.4114783284
1980	31078.7872329763
1981	31575.3918003881
1982	30168.7467575427
1983	30809.4664133729
1984	32277.150839272
1985	33515.2739727078
1986	33801.9610252136
1987	34806.6647405827
1988	35814.4989610819
1989	35915.815916846
1990	35383.8975358375
1991	34318.237325274
1992	34132.790639844
1993	34726.5814401028
1994	35830.106629382
1995	36452.8404812156
1996	36695.0998646461
1997	37974.2926450653
1998	39047.2564422557
1999	40722.3021500317
2000	42722.1261334838
2001	42940.3055057853
2002	43891.9981267152
2003	44292.8220078559
2004	45357.9735970594
2005	46410.4599728734
2006	47368.5222036959
2007	47934.4937502091
2008	47887.0732989681
2009	45861.9195197196
2010	46622.0873381958
2011	47654.5374966875
2012	48031.2658360991
2013	48757.7533329648
2014	49611.2445157173
2015	49642.5591585562
2016	49791.3123605572
2017	50726.7670985953
2018	50850.5417076065