Year	current US$
1977	-4922222.22222222
1978	-3888888.88888888
1979	-9592592.5925926
1980	-14518518.5185185
1981	-16433333.3333333
1982	-18418518.5185185
1983	-26500000
1984	-19629629.6296296
1985	-17537037.037037
1986	-14681481.4814815
1987	-22218518.5185185
1988	-31703703.7037037
1989	-40196296.2962963
1990	-49985185.1851852
1991	-35007407.4074074
1992	-12329629.6296296
1993	-25366666.6666667
1994	-22181481.4814815
1995	-53681481.4814815
1996	-65659259.2592593
1997	-55974493.0115301
1998	-48081414.7480814
1999	-59296333.3704074
2000	-98846995.1432914
2001	-88975271.5678642
2002	-103078634.189745
2003	-90717643.5694955
2004	-47700518.5185185
2005	-53470851.8518519
2006	-84981370.3703704
2007	-113299629.62963
2008	-201565148.148148
2009	-190810407.407407
2010	-155126851.851852
2011	-112931370.37037
2012	-73219888.888889
2013	-55099925.9259259
2014	44592000
2015	12780370.3703704
2016	4155592.59259259