Year	current US$
1977	79070370.3703704
1978	86548148.1481481
1979	108151851.851852
1980	126040740.740741
1981	154262962.962963
1982	157107407.407407
1983	159729629.62963
1984	183048148.148148
1985	195351851.851852
1986	233103703.703704
1987	264544444.444444
1988	276455555.555556
1989	338618518.518519
1990	353725925.925926
1991	386592592.592593
1992	405722222.222222
1993	383351851.851852
1994	403529629.62963
1995	552707407.407407
1996	568274074.074074
1997	577833333.333333
1998	634985185.185185
1999	670525925.925926
2000	685348148.148148
2001	664396296.296296
2002	682125925.925926
2003	715677777.777778
2004	764681481.481481
2005	751366666.666667
2006	926092592.592592
2007	1106637037.03704
2008	1091262962.96296
2009	944018518.518518
2010	1071974074.07407
2011	1160737037.03704
2012	1092751851.85185
2013	1138151851.85185
2014	1196170370.37037
2015	1219181481.48148
2016	1425037037.03704