Year	Dollars
1970-01-01	2620000000.00000
1971-01-01	-980000000.00000
1972-01-01	-5260000000.00000
1973-01-01	7580000000.00000
1974-01-01	1700000000.00000
1975-01-01	17880000000.00000
1976-01-01	3840000000.00000
1977-01-01	-15100000000.00000
1978-01-01	-15747000000.00000
1979-01-01	-156700000.00000
1980-01-01	2127000000.00000
1981-01-01	4810000000.00000
1982-01-01	-11607000000.00000
1983-01-01	-44222000000.00000
1984-01-01	-99008000000.00000
1985-01-01	-124455000000.00000
1986-01-01	-147174000000.00000
1987-01-01	-160647000000.00000
1988-01-01	-121258000000.00000
1989-01-01	-99506000000.00000
1990-01-01	-78952000000.00000
1991-01-01	2851000000.00000
1992-01-01	-51605050000.00000
1993-01-01	-84782800000.00000
1994-01-01	-121642400000.00000
1995-01-01	-113561000000.00000
1996-01-01	-124727100000.00000
1997-01-01	-140724500000.00000
1998-01-01	-215037000000.00000
1999-01-01	-301651600000.00000
2000-01-01	-416342500000.00000
2001-01-01	-396598894288.58002
2002-01-01	-457250096629.03003
2003-01-01	-519090322628.57001
2004-01-01	-628523736613.97998
2005-01-01	-745779979477.50000
2006-01-01	-800618466000.00000
2007-01-01	-710298754000.00000
2008-01-01	-677140573000.00000