Year	Dollars
1976-01-01	0
1977-01-01	0
1978-01-01	0
1979-01-01	0
1980-01-01	0
1981-01-01	0
1982-01-01	0
1983-01-01	0
1984-01-01	0
1985-01-01	0
1986-01-01	0
1987-01-01	0
1988-01-01	0
1989-01-01	0
1990-01-01	0
1991-01-01	0
1992-01-01	0
1993-01-01	0
1994-01-01	9215000000
1995-01-01	285000000
1996-01-01	94000000
1997-01-01	66000000
1998-01-01	63000000
1999-01-01	55000000
2000-01-01	34000000
2001-01-01	76000000
2002-01-01	-7000000
2003-01-01	-46000000
2004-01-01	1180000000
2005-01-01	995000000
2006-01-01	2105000000
2007-01-01	4771000000
2008-01-01	6115000000