Quarter	Billions of US Dollars
1987-01-01	0.2467
1987-04-01	0.4197
1987-07-01	0.0697
1987-10-01	0.1105
1988-01-01	0.4747
1988-04-01	0.5483
1988-07-01	0.5117
1988-10-01	0.4277
1989-01-01	0.5174
1989-04-01	0.1342
1989-07-01	0.4355
1989-10-01	0.3876
1990-01-01	0.2434
1990-04-01	0.2783
1990-07-01	0.6699
1990-10-01	0.0369
1991-01-01	0.4083
1991-04-01	0.3307
1991-07-01	0.4316
1991-10-01	0.1592
1992-01-01	0.6352
1992-04-01	-0.8446
1992-07-01	0.4772
1992-10-01	-0.1342
1993-01-01	-0.6285
1993-04-01	0.0490
1993-07-01	4.5774
1993-10-01	1.3105
1994-01-01	1.0893
1994-04-01	0.5841
1994-07-01	0.6815
1994-10-01	1.1427
1995-01-01	0.5182
1995-04-01	0.0974
1995-07-01	0.9294
1995-10-01	0.1485
1996-01-01	-1.1595
1996-04-01	-1.8909
1996-07-01	1.6928
1996-10-01	0.2616
1997-01-01	-0.1974
1997-04-01	-0.2703
1997-07-01	0.6596
1997-10-01	-0.4959
1998-01-01	0.4286
1998-04-01	1.4142
1998-07-01	0.3173
1998-10-01	-0.0928
1999-01-01	-0.0852
1999-04-01	2.3632
1999-07-01	4.3693
1999-10-01	1.1046
2000-01-01	3.6427
2000-04-01	0.7261
2000-07-01	1.1204
2000-10-01	-2.0376
2001-01-01	1.8837
2001-04-01	3.9033
2001-07-01	2.9925
2001-10-01	0.9451
2002-01-01	2.3343
2002-04-01	1.9605
2002-07-01	2.2074
2002-10-01	1.0213
2003-01-01	2.6845
2003-04-01	1.1716
2003-07-01	5.0430
2003-10-01	3.3756
2004-01-01	9.5255
2004-04-01	6.2330
2004-07-01	5.6889
2004-10-01	2.3091
2005-01-01	5.6455
2005-04-01	4.9472
2005-07-01	1.5629
2005-10-01	3.3091
2006-01-01	5.4438
2006-04-01	6.5921
2006-07-01	6.6414
2006-10-01	10.0093
2007-01-01	15.2122
2007-04-01	15.1057
2007-07-01	-2.5925
2007-10-01	-2.3459
2008-01-01	1.6170
2008-04-01	-2.9117
2008-07-01	1.9222
2008-10-01	-1.3123
2009-01-01	0.0925
2009-04-01	3.3107
2009-07-01	3.2366
2009-10-01	5.4756
2010-01-01	-0.3233
2010-04-01	-0.4316
2010-07-01	4.6927
2010-10-01	3.3488
2011-01-01	0.6442
2011-04-01	1.2670
2011-07-01	1.4250
2011-10-01	3.1192
2012-01-01	-0.3603
2012-04-01	-0.0196
2012-07-01	7.9268
2012-10-01	4.0532
2013-01-01	-3.8670
2013-04-01	5.4007
2013-07-01	0.8050
2013-10-01	3.8030
2014-01-01	-4.2713
2014-04-01	0.5347
2014-07-01	-0.4425
2014-10-01	-3.1532
2015-01-01	1.2387
2015-04-01	3.4809