Quarter	Billions of US Dollars
1973-04-01	0.03000
1974-04-01	0.05150
1975-10-01	0.01890
1976-04-01	0.01700
1976-07-01	0.01720
1977-04-01	0.02000
1977-07-01	0.04330
1977-10-01	0.06600
1978-04-01	0.04670
1979-04-01	0.09630
1980-07-01	0.01210
1981-04-01	-0.04801
1982-07-01	-0.02676
1982-10-01	-0.02043
1983-04-01	-0.02000
1983-07-01	-0.03500
1983-10-01	-0.01716
1984-04-01	-0.05117
1984-10-01	-0.04138
1985-10-01	-0.00500
1986-10-01	-0.01240
1987-04-01	-0.00500
1987-07-01	-0.00262
1988-04-01	-0.00500
1988-10-01	-0.00267
1989-04-01	-0.02500
1989-07-01	-0.00241
1990-04-01	-0.06441
1990-07-01	-0.00299
1994-04-01	-0.09678
1996-04-01	0.05182
1996-07-01	0.01603
1996-10-01	0.00000
1997-04-01	-0.00634
1997-10-01	-0.00508
1998-04-01	0.00028
1998-07-01	0.01222
2000-07-01	-0.02443
2001-01-01	0.00023
2001-04-01	0.00330
2001-07-01	-0.00172
2001-10-01	-0.00047
2002-04-01	0.00117
2002-07-01	0.00181
2002-10-01	0.00075
2003-01-01	-0.00019
2003-04-01	0.00246
2004-01-01	0.00265
2004-04-01	0.00293
2005-10-01	0.17554
2006-07-01	-0.08046
2009-01-01	0.00000
2013-10-01	-0.22138