Quarter	Billions of US Dollars
1971-10-01	0.0306
1972-01-01	0.0815
1972-04-01	0.0400
1972-07-01	0.0200
1972-10-01	0.0350
1973-01-01	0.0613
1973-07-01	0.0507
1973-10-01	0.0657
1974-10-01	0.0500
1975-01-01	0.1325
1975-04-01	0.0772
1975-07-01	0.0240
1975-10-01	0.0618
1976-01-01	0.0617
1976-04-01	0.1431
1976-07-01	0.0906
1976-10-01	0.0811
1977-01-01	0.1205
1977-04-01	0.3059
1977-07-01	0.4696
1977-10-01	0.4918
1978-01-01	0.4633
1978-04-01	0.1242
1978-07-01	0.1000
1978-10-01	0.1000
1979-01-01	0.0650
1979-07-01	0.1730
1979-10-01	0.0250
1980-01-01	0.0562
1980-04-01	0.2010
1980-07-01	0.0250
1980-10-01	0.0900
1981-01-01	0.2250
1981-04-01	0.6538
1981-07-01	0.4653
1981-10-01	0.6500
1982-01-01	0.7425
1982-04-01	0.3101
1982-07-01	0.2444
1985-10-01	0.0486
1986-04-01	0.0500
1989-04-01	0.1000
1989-10-01	0.1500
1990-01-01	35.9186
1990-04-01	0.5834
1990-07-01	0.6232
1990-10-01	0.2500
1991-01-01	1.3071
1991-04-01	1.0250
1991-07-01	0.6171
1991-10-01	0.8003
1992-01-01	0.3471
1992-04-01	0.3994
1992-07-01	0.6644
1992-10-01	2.3234
1993-01-01	1.3631
1993-04-01	2.1464
1993-07-01	0.8763
1993-10-01	1.6571
1994-01-01	4.2530
1994-04-01	0.7649
1994-07-01	0.9688
1994-10-01	0.4683
1995-01-01	0.1009
1995-04-01	1.1055
1995-07-01	2.5903
1995-10-01	1.2199
1996-01-01	4.0155
1996-04-01	4.1273
1996-07-01	9.3549
1996-10-01	1.6404
1997-01-01	4.0004
1997-04-01	5.8983
1997-07-01	3.5356
1997-10-01	1.2367
1998-01-01	2.9111
1998-04-01	1.4320
1998-07-01	2.1316
1998-10-01	0.8500
1999-01-01	2.2000
1999-04-01	3.4545
1999-07-01	0.9924
1999-10-01	2.5478
2000-01-01	5.0422
2000-04-01	0.7015
2000-07-01	2.6733
2000-10-01	0.0170
2001-01-01	6.6721
2001-04-01	1.5084
2001-07-01	2.4000
2001-10-01	1.8487
2002-01-01	1.9500
2002-04-01	0.3884
2002-07-01	1.9136
2002-10-01	0.9500
2003-01-01	3.0039
2003-04-01	3.4012
2003-07-01	0.3501
2003-10-01	2.4000
2004-01-01	3.8697
2004-04-01	3.2633
2004-07-01	2.3300
2004-10-01	1.9411
2005-01-01	4.3800
2005-04-01	2.4259
2005-07-01	0.7689
2005-10-01	0.5771
2006-01-01	3.4763
2006-04-01	0.7695
2006-07-01	0.1574
2006-10-01	1.7652
2007-01-01	2.1944
2007-04-01	1.5808
2007-07-01	1.9480
2007-10-01	1.6127
2008-01-01	1.5713
2008-04-01	1.0493
2008-07-01	0.3350
2008-10-01	2.0150
2009-01-01	3.9000
2009-04-01	3.6833
2009-07-01	5.0031
2009-10-01	8.6543
2010-01-01	10.6594
2010-04-01	7.3993
2010-07-01	5.8575
2010-10-01	3.4919
2011-01-01	7.0455
2011-04-01	4.7680
2011-07-01	6.1320
2011-10-01	4.8504
2012-01-01	10.3445
2012-04-01	3.6696
2012-07-01	9.1649
2012-10-01	7.2159
2013-01-01	5.7008
2013-04-01	7.2221
2013-07-01	20.2666
2013-10-01	11.9357
2014-01-01	14.2075
2014-04-01	12.9555
2014-07-01	5.7935
2014-10-01	8.1792
2015-01-01	15.9806
2015-04-01	10.3463