Quarter	Billions of US Dollars
1980-07-01	0.0250
1982-01-01	0.0429
1982-04-01	0.0205
1983-04-01	0.0400
1983-07-01	0.0202
1984-10-01	0.0830
1985-01-01	0.1157
1985-04-01	0.1289
1985-07-01	0.3765
1985-10-01	0.1491
1986-01-01	0.4641
1986-04-01	0.4775
1986-07-01	0.1738
1986-10-01	0.1114
1987-01-01	0.1915
1987-04-01	0.2500
1987-07-01	0.3663
1987-10-01	0.2768
1988-01-01	0.2751
1988-04-01	0.0256
1988-07-01	0.2134
1988-10-01	0.1936
1989-01-01	0.1538
1991-04-01	0.1429
1991-10-01	0.1145
1992-01-01	0.2274
1992-04-01	0.0700
1992-07-01	0.3890
1992-10-01	0.3900
1993-01-01	0.4042
1993-04-01	0.6626
1993-07-01	1.1015
1993-10-01	0.6265
1994-01-01	1.5000
1994-04-01	0.7483
1994-07-01	0.8922
1994-10-01	0.4685
1995-01-01	0.1705
1995-07-01	0.7592
1995-10-01	0.5398
1996-01-01	0.8060
1996-04-01	0.8285
1996-07-01	1.1603
1996-10-01	0.6501
1997-01-01	0.7290
1997-04-01	1.7877
1997-07-01	0.5472
1997-10-01	0.5000
1998-04-01	0.1190
1998-10-01	1.0000
1999-04-01	0.6500
1999-07-01	0.1400
1999-10-01	0.3300
2000-04-01	0.4877
2001-04-01	1.4819
2001-10-01	0.5000
2002-01-01	1.0000
2003-01-01	0.4830
2003-07-01	0.2443
2003-10-01	1.4654
2004-01-01	0.1500
2004-04-01	0.1500
2004-07-01	1.9987
2004-10-01	2.0231
2005-07-01	2.5000
2006-04-01	0.0319
2006-10-01	0.0500
2007-01-01	1.2600
2007-04-01	2.8539
2007-07-01	0.7524
2007-10-01	0.1725
2008-01-01	0.5750
2008-04-01	0.0545
2008-07-01	2.5871
2009-04-01	0.7721
2009-07-01	2.1962
2009-10-01	0.5024
2010-01-01	0.1027
2010-04-01	0.0262
2010-07-01	0.8527
2010-10-01	2.0340
2011-01-01	1.2745
2011-04-01	2.0166
2011-07-01	3.4844
2011-10-01	0.8566
2012-01-01	2.4314
2012-04-01	9.2537
2012-07-01	1.4757
2012-10-01	3.7546
2013-01-01	2.5357
2013-04-01	3.6743
2013-07-01	1.6738
2013-10-01	6.3687
2014-01-01	2.5813
2014-04-01	8.9217
2014-07-01	6.9060
2014-10-01	21.4997
2015-01-01	0.0856
2015-04-01	7.2168