Year	Dollars
1975-01-01	2740359182.392726900
1976-01-01	-3356210918.834119800
1977-01-01	-405105191.702075000
1978-01-01	7063714715.305215800
1979-01-01	5141501556.274738300
1980-01-01	-4208340488.661129000
1981-01-01	-4810818971.659957900
1982-01-01	-12082174630.808216000
1983-01-01	-5165512057.445613900
1984-01-01	-875999017.508230210
1985-01-01	-34597949.283470154
1986-01-01	2429990544.037242900
1987-01-01	-4445832867.075943000
1988-01-01	-4618908099.788681000
1989-01-01	-4671010644.326248200
1990-01-01	-9944228234.232320800
1991-01-01	-6518255441.786895800
1992-01-01	3893429894.582725500
1993-01-01	8989785410.580753300
1994-01-01	7415274026.520443000
1995-01-01	10840336630.729622000
1996-01-01	20560612391.710381000
1997-01-01	37801148626.718163000
1998-01-01	37698545877.124527000
1999-01-01	45864577900.558884000
2000-01-01	19674078610.903900000
2001-01-01	23602520684.949501000
2002-01-01	18007404679.092499000
2003-01-01	12860125404.556400000
2004-01-01	11030415595.102800000
2005-01-01	-10260220351.978800000
2006-01-01	-12988244366.408800000
2007-01-01	-26610486266.723598000
2008-01-01	-49876972216.695503000