Year	current US$
1967	28826358.67027605
1968	35670534.98216473
1969	38451659.98077421
1970	50941484.97452923
1971	64597807.75256295
1972	75727726.4148171
1973	85038165.33996733
1974	89151575.22622678
1975	94452332.9211972
1976	107895890.25
1977	139516236.75
1978	176528946.75
1979	263420375
1980	322807750
1981	325746750
1982	335770500
1983	331398125
1984	366357875
1985	400393000
1986	445728054.896672
1987	493736150.219925
1988	585028385.055135
1989	669888379.41496
1990	617919186.189685
1991	599185839.56076
1992	596173747.49443
1993	668985680.513855
1994	778882896.673995
1995	787839882.29544
1996	949287836.57213
1997	879298515.30441
1998	929054053.159785
1999	970556081.7022
2000	1064781635.4990599
2001	990856502.59737
2002	1004928771.6273
2003	1094043985.36274
2004	1068284850.51242
2005	1227037707.2939699
2006	1353730323.5976899
2007	1424051599.3080602
2008	1487922540.47401
2009	1375683560.96787
2010	1294580171.94325
2011	1262177293.17546
2012	1211177192.67028
2013	1409164061.8615
2014	1343502452.4867399
2015	1385956485.63185
2016	1405520196.2095
2017	1496535152.5854502