Year	US Dollars
1970	-194141001.23194
1971	63473744.95095
1972	291686922.70297
1973	19479615.97329
1974	-1715388858.246
1975	-891122656.42647
1976	-350740452.06547
1977	-247852276.09361
1978	137959866.22074
1979	-321546629.26976
1980	-251881876.0857
1981	-738489717.75872
1982	-718135469.77422
1983	-285883280.7571
1984	-558436171.31598
1985	-526854219.94885
1986	154203633.29109
1987	903744970.59734
1988	1799033816.42512
1989	317216073.85926
1990	416542162.19447
1991	1576074724.28539
1992	1311675882.60315
1993	1707870139.92589
1994	1516576103.54723
1995	1196865037.19447
1996	1109338143.47162
1997	921011158.04072
1998	752671193.2207
1999	293736052.72718
2000	1565011197.47069
2001	1954629164.57392
2002	2024249593.37572
2003	1557347013.55808
2004	298487394.95798
2005	-1661620784.34134
2006	-430581674.34018
2007	166090982.58249
2008	-334575103.67611
2009	2818414641.76401
2010	3363515074.27926
2011	2607814903.53644
2012	1225812230.32052
2013	3013757559.82701
2014	1463374166.96624
2015	1348698547.74316
2016	591705678.6342