Quarter	Billions of US Dollars
1987-01-01	0.0671
1987-04-01	0.1730
1987-07-01	0.0998
1987-10-01	0.3125
1988-01-01	-0.3101
1988-04-01	0.0495
1988-07-01	0.3105
1988-10-01	0.0547
1989-01-01	-0.1095
1989-04-01	0.1638
1989-10-01	0.3135
1990-01-01	-0.0020
1990-04-01	-0.2490
1990-07-01	0.3419
1990-10-01	0.2504
1991-01-01	0.6741
1991-04-01	1.0284
1991-07-01	0.1564
1991-10-01	0.0698
1992-01-01	0.4979
1992-04-01	0.1006
1992-07-01	0.7489
1992-10-01	0.0678
1993-01-01	0.3407
1993-04-01	0.3113
1993-07-01	1.0201
1993-10-01	0.4363
1994-01-01	1.7597
1994-04-01	1.2519
1994-07-01	1.7108
1994-10-01	0.7200
1995-01-01	1.8470
1995-04-01	1.2462
1995-07-01	2.1113
1995-10-01	2.0039
1996-01-01	2.1784
1996-04-01	1.9483
1996-07-01	5.3054
1996-10-01	5.1499
1997-01-01	3.4653
1997-04-01	3.1416
1997-07-01	2.1224
1997-10-01	-1.1861
1998-01-01	-1.6078
1998-04-01	-0.5848
1998-07-01	-1.4714
1998-10-01	-1.0068
1999-01-01	-1.4697
1999-04-01	-1.0214
1999-07-01	-1.6694
1999-10-01	0.1636
2000-01-01	0.6409
2000-04-01	-0.7035
2000-07-01	-1.0557
2000-10-01	-1.6105
2001-01-01	-1.3225
2001-04-01	-1.5150
2001-07-01	-3.1556
2001-10-01	-0.1182
2002-01-01	-1.4245
2002-04-01	0.2805
2002-07-01	-0.0606
2002-10-01	0.5145
2003-01-01	0.5445
2003-04-01	3.0285
2003-07-01	2.4753
2003-10-01	2.2429
2004-01-01	4.0310
2004-04-01	1.7636
2004-07-01	2.4680
2004-10-01	4.1661
2005-01-01	3.8168
2005-04-01	1.2671
2005-07-01	1.3617
2005-10-01	5.5097
2006-01-01	1.5326
2006-04-01	5.5545
2006-07-01	5.2348
2006-10-01	3.8544
2007-01-01	10.7918
2007-04-01	9.6061
2007-07-01	2.4118
2007-10-01	3.6290
2008-01-01	2.7044
2008-04-01	3.5269
2008-07-01	0.0031
2008-10-01	-7.6025
2009-01-01	0.6291
2009-04-01	4.9184
2009-07-01	1.3337
2009-10-01	-2.0239
2010-01-01	5.5830
2010-04-01	0.9057
2010-07-01	3.5932
2010-10-01	10.5448
2011-01-01	7.9708
2011-04-01	10.5937
2011-07-01	2.7688
2011-10-01	7.3665
2012-01-01	17.7688
2012-04-01	6.0031
2012-07-01	14.2834
2012-10-01	2.7977
2013-01-01	11.7975
2013-04-01	9.3077
2013-07-01	17.6453
2013-10-01	20.8275
2014-01-01	24.3528
2014-04-01	22.3287
2014-07-01	17.7086
2014-10-01	26.8424
2015-01-01	2.4405
2015-04-01	8.3896