Year	current US$
1977	96988888.8888889
1978	118696296.296296
1979	143762962.962963
1980	171851851.851852
1981	206400000
1982	205170370.37037
1983	193277777.777778
1984	221585185.185185
1985	241014814.814815
1986	288659259.259259
1987	323992592.592593
1988	358403703.703704
1989	446507407.407407
1990	456162962.962963
1991	495903703.703704
1992	533925925.925926
1993	522951851.851852
1994	547933333.333333
1995	688703703.703704
1996	709585185.185185
1997	732540740.740741
1998	795385185.185185
1999	855877777.777778
2000	867088888.888889
2001	834533333.333333
2002	836159259.259259
2003	866937037.037037
2004	925537037.037037
2005	1021140740.74074
2006	1329096296.2963
2007	1440785185.18519
2008	1471296296.2963
2009	1284959259.25926
2010	1420451851.85185
2011	1524003703.7037
2012	1446648148.14815
2013	1446451851.85185
2014	1464255555.55556
2015	1506111111.11111
2016	1792740740.74074