Year	Dollars
1977-01-01	10910000000.0000150
1978-01-01	16530000000.0000610
1979-01-01	-8740000000.0000153
1980-01-01	-10750000000.0000000
1981-01-01	4770000000.0000000
1982-01-01	6850000000.0000000
1983-01-01	20800000000.0000000
1984-01-01	35000000000.0000000
1985-01-01	51128904213.3720170
1986-01-01	85876588528.6472020
1987-01-01	84350605069.5773320
1988-01-01	79249300914.1246950
1989-01-01	63214903315.1797030
1990-01-01	44078234740.9434970
1991-01-01	68203460492.6363070
1992-01-01	112573793656.6299100
1993-01-01	131637059578.5053700
1994-01-01	130255270893.3163800
1995-01-01	111044214443.8723000
1996-01-01	65792247620.4248280
1997-01-01	96813949006.8278660
1998-01-01	118749177477.0777900
1999-01-01	114603955355.3624600
2000-01-01	119660318892.4952900
2001-01-01	87797698747.1842500
2002-01-01	112447291727.8380700
2003-01-01	136216141061.8252300
2004-01-01	172058719259.7515600
2005-01-01	165783404609.6804800
2006-01-01	171077763649.9289900
2007-01-01	211684945352.0360100
2008-01-01	159363360463.0580100