Quarter	Billions of US Dollars
1968-07-01	0.04000
1973-10-01	0.00250
1974-01-01	0.05000
1975-01-01	0.01980
1980-04-01	0.03000
1981-04-01	0.02000
1981-10-01	0.13640
1982-04-01	0.03000
1984-04-01	0.02110
1984-07-01	0.02070
1984-10-01	0.04040
1985-01-01	0.15000
1985-04-01	0.07860
1985-07-01	0.02060
1985-10-01	0.24510
1986-01-01	0.29420
1986-04-01	0.03010
1986-10-01	0.04480
1987-01-01	0.41470
1987-07-01	0.08230
1987-10-01	0.12030
1988-01-01	0.19760
1988-04-01	0.12000
1988-07-01	0.34120
1988-10-01	0.12500
1989-01-01	0.15040
1989-04-01	0.10000
1989-07-01	0.14390
1989-10-01	0.20000
1990-01-01	0.12500
1990-04-01	0.14890
1990-10-01	0.23620
1991-01-01	0.15150
1991-07-01	0.33000
1993-07-01	0.06500
1993-10-01	0.41500
1994-01-01	0.53300
1994-04-01	0.19480
1994-07-01	0.20000
1995-07-01	0.65000
1995-10-01	0.15000
1996-01-01	0.20000
1996-04-01	0.32000
1996-07-01	0.46776
1996-10-01	0.22205
1997-01-01	0.63900
1997-04-01	0.31100
1997-07-01	1.15117
1997-10-01	0.08034
1998-01-01	0.43000
1998-04-01	0.33698
1999-01-01	0.10000
1999-07-01	0.12560
1999-10-01	0.02650
2000-01-01	0.68932
2001-01-01	0.09930
2001-10-01	0.27486
2002-04-01	0.10000
2002-10-01	0.15300
2003-07-01	0.10000
2003-10-01	0.35000
2004-01-01	0.88805
2004-04-01	0.97500
2004-07-01	1.56276
2004-10-01	2.02332
2005-01-01	2.41807
2005-04-01	0.63500
2005-07-01	1.43168
2005-10-01	1.74072
2006-01-01	3.98694
2006-04-01	1.33104
2006-07-01	1.31946
2006-10-01	2.36191
2007-01-01	6.86883
2007-04-01	5.12652
2007-07-01	3.56245
2007-10-01	1.39720
2008-01-01	0.80518
2008-04-01	1.38682
2008-07-01	0.05000
2008-10-01	1.00000
2009-04-01	1.25000
2009-07-01	1.19500
2009-10-01	4.07690
2010-01-01	1.85100
2010-04-01	1.02832
2010-07-01	1.57500
2010-10-01	4.43933
2011-01-01	4.58294
2011-04-01	7.18759
2011-07-01	1.90000
2011-10-01	0.14718
2012-01-01	6.10069
2012-04-01	0.48673
2012-07-01	3.86359
2012-10-01	4.63705
2013-01-01	6.89561
2013-04-01	7.37533
2013-07-01	1.66180
2013-10-01	4.27685
2014-01-01	4.35297
2014-04-01	6.46541
2014-07-01	8.24382
2014-10-01	4.79287
2015-01-01	5.15028
2015-04-01	3.43758