Year	Dollars
1970-01-01	1970398426.43981620
1971-01-01	2716894254.07973670
1972-01-01	533353862.86735010
1973-01-01	-2411629487.30157470
1974-01-01	-7448453413.84723470
1975-01-01	-3465069948.22820900
1976-01-01	-1380238419.49781680
1977-01-01	145041980.63299274
1978-01-01	2163486629.48545070
1979-01-01	-782636743.68549061
1980-01-01	6861992454.99432370
1981-01-01	14126907663.53697000
1982-01-01	7984708624.95622830
1983-01-01	5291692208.22874160
1984-01-01	1833423998.03174690
1985-01-01	3314271039.14457610
1986-01-01	-1323753956.88238720
1987-01-01	-12589592392.45764200
1988-01-01	-35326156228.25080900
1989-01-01	-43108544486.49111200
1990-01-01	-38810922316.94356500
1991-01-01	-19021852919.39477500
1992-01-01	-23204209131.16366600
1993-01-01	-17721103946.91244900
1994-01-01	-10025834771.63362100
1995-01-01	-13436363557.05448200
1996-01-01	-10328612315.62320700
1997-01-01	-1402652030.84065630
1998-01-01	-5272998683.33097080
1999-01-01	-35407438067.66975400
2000-01-01	-38800261342.74626900
2001-01-01	-30280821611.46417200
2002-01-01	-27858154620.41297500
2003-01-01	-30001962145.75249900
2004-01-01	-45414941411.61180100
2005-01-01	-59406046453.70760300
2006-01-01	-81957621058.96150200
2007-01-01	-71079401612.06869500
2008-01-01	-41159056642.87550400