Year	Dollars
1974-01-01	-561000000
1975-01-01	-1648000000
1976-01-01	-2029000000
1977-01-01	-3140000000
1978-01-01	-1265000000
1979-01-01	-1413000000
1980-01-01	-3408000000
1981-01-01	-1936000000
1982-01-01	-952000000
1983-01-01	-1923000000
1984-01-01	-1439000000
1985-01-01	-1013000000
1986-01-01	-1465000000
1987-01-01	-806000000
1988-01-01	1596000000
1989-01-01	938000000
1990-01-01	-2625000000
1991-01-01	250000000
1992-01-01	-974000000
1993-01-01	-6433000000
1994-01-01	2631000000
1995-01-01	-2338000000
1996-01-01	-2437000000
1997-01-01	-2638000000
1998-01-01	2000000000
1999-01-01	-925000000
2000-01-01	-9920000000
2001-01-01	3760000000
2002-01-01	-626000000
2003-01-01	-7515000000
2004-01-01	-14431000000
2005-01-01	-22309000000
2006-01-01	-32249000000
2007-01-01	-38434000000
2008-01-01	-41524000000