Year	US Dollars
1977	-3259259.25926
1978	2659259.25926
1979	5840740.74074
1980	-21322222.22222
1981	-27818518.51852
1982	-54233333.33333
1983	-23181481.48148
1984	-17803703.7037
1985	-35518518.51852
1986	-87570370.37037
1987	-76159259.25926
1988	-18274074.07407
1989	-47974074.07407
1990	4740740.74074
1991	11992592.59259
1992	20811111.11111
1993	40785185.18519
1994	14533333.33333
1995	-37318518.51852
1996	-64844444.44444
1997	-35000000
1998	-24022222.22222
1999	-56492592.59259
2000	-31599629.62963
2001	-41238888.88889
2002	-46574333.33333
2003	-72113259.25926
2004	-58365296.2963
2005	-137451148.14815
2006	-270243370.37037
2007	-351082814.81481
2008	-326839222.22222
2009	-144853592.59259
2010	-155096000
2011	-103611962.96296
2012	-158649592.59259
2013	-175232481.48148
2014	-151851851.85185
2015	-68220703.7037
2016	-77812777.77778